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dealii.git
6 years agoincrease precision in Slepc SHEP test to avoid missed eigenpairs 5134/head
Denis Davydov [Sat, 23 Sep 2017 21:40:39 +0000 (23:40 +0200)]
increase precision in Slepc SHEP test to avoid missed eigenpairs

7 years agoMerge pull request #5105 from Rombur/cuda_documentation
Denis Davydov [Tue, 19 Sep 2017 08:11:38 +0000 (10:11 +0200)]
Merge pull request #5105 from Rombur/cuda_documentation

Add documentation to enable CUDA support

7 years agoMerge pull request #5103 from bangerth/fix-warning
Daniel Arndt [Mon, 18 Sep 2017 20:09:21 +0000 (22:09 +0200)]
Merge pull request #5103 from bangerth/fix-warning

Avoid a warning about an unused argument.

7 years agoMerge pull request #5098 from drwells/add-sundials-copy-test
Luca Heltai [Mon, 18 Sep 2017 17:27:51 +0000 (19:27 +0200)]
Merge pull request #5098 from drwells/add-sundials-copy-test

Add a test for copying SUNDIALS vectors.

7 years agoMerge pull request #5099 from drwells/remove-vector-slice-1
David Wells [Mon, 18 Sep 2017 15:22:19 +0000 (11:22 -0400)]
Merge pull request #5099 from drwells/remove-vector-slice-1

Remove VectorSlice from some internal functions.

7 years agoAdd documentation to enable CUDA support 5105/head
Bruno Turcksin [Sun, 17 Sep 2017 04:04:04 +0000 (00:04 -0400)]
Add documentation to enable CUDA support

7 years agoMerge pull request #5102 from bangerth/fix-test
Daniel Arndt [Mon, 18 Sep 2017 14:04:54 +0000 (16:04 +0200)]
Merge pull request #5102 from bangerth/fix-test

Further increase test accuracy.

7 years agoAvoid a warning about an unused argument. 5103/head
Wolfgang Bangerth [Mon, 18 Sep 2017 13:57:26 +0000 (07:57 -0600)]
Avoid a warning about an unused argument.

7 years agoFurther increase test accuracy. 5102/head
Wolfgang Bangerth [Mon, 18 Sep 2017 13:55:58 +0000 (07:55 -0600)]
Further increase test accuracy.

7 years agoMerge pull request #5078 from GivAlz/master
Daniel Arndt [Mon, 18 Sep 2017 08:20:36 +0000 (10:20 +0200)]
Merge pull request #5078 from GivAlz/master

Adding Bounding Boxes class to Base

7 years agoMerge pull request #5093 from bangerth/hp-fixes
Martin Kronbichler [Mon, 18 Sep 2017 07:38:50 +0000 (09:38 +0200)]
Merge pull request #5093 from bangerth/hp-fixes

Provide DoFAccessor::set_dof_indices() for hp.

7 years agoMerge pull request #5097 from drwells/sundials-fixes-2
David Wells [Sun, 17 Sep 2017 23:35:15 +0000 (19:35 -0400)]
Merge pull request #5097 from drwells/sundials-fixes-2

Reword the description of SUNDIALS_INCLUDE_DIRS.

7 years agoCreated class Bounding Box and its routine point_inside 5078/head
Giovanni Alzetta [Sun, 17 Sep 2017 23:25:10 +0000 (23:25 +0000)]
Created class Bounding Box and its routine point_inside

7 years agoRemove VectorSlice from some internal functions. 5099/head
David Wells [Sat, 16 Sep 2017 20:36:18 +0000 (16:36 -0400)]
Remove VectorSlice from some internal functions.

7 years agoAdd a test for copying SUNDIALS vectors. 5098/head
David Wells [Sun, 17 Sep 2017 20:55:58 +0000 (16:55 -0400)]
Add a test for copying SUNDIALS vectors.

7 years agoReword the description of SUNDIALS_INCLUDE_DIRS. 5097/head
David Wells [Sat, 16 Sep 2017 21:29:26 +0000 (17:29 -0400)]
Reword the description of SUNDIALS_INCLUDE_DIRS.

7 years agoMerge pull request #5080 from masterleinad/default_constructors
Wolfgang Bangerth [Sun, 17 Sep 2017 18:21:49 +0000 (12:21 -0600)]
Merge pull request #5080 from masterleinad/default_constructors

Default constructors and destructors

7 years agoMerge pull request #5096 from drwells/sundials-fixes
Luca Heltai [Sat, 16 Sep 2017 21:27:30 +0000 (23:27 +0200)]
Merge pull request #5096 from drwells/sundials-fixes

Sundials fixes

7 years agoGet rid of two unused variable warnings. 5096/head
David Wells [Sat, 16 Sep 2017 18:50:30 +0000 (14:50 -0400)]
Get rid of two unused variable warnings.

7 years agoImprove the path-finding for FindSUNDIALS.cmake.
David Wells [Sat, 16 Sep 2017 18:00:51 +0000 (14:00 -0400)]
Improve the path-finding for FindSUNDIALS.cmake.

This fixes an issue where if SUNDIALS_DIR is never set then SUN_INC is just
'/include/', which is usually not a directory.

7 years agoMake the SUNDIALS vector copy more generic.
David Wells [Sat, 16 Sep 2017 18:00:30 +0000 (14:00 -0400)]
Make the SUNDIALS vector copy more generic.

7 years agoMerge pull request #4852 from luca-heltai/ida-interface
Luca Heltai [Sat, 16 Sep 2017 04:44:14 +0000 (06:44 +0200)]
Merge pull request #4852 from luca-heltai/ida-interface

IDAInterface

7 years agoAdd include file to fix errors in multigrid tests 5080/head
Daniel Arndt [Fri, 15 Sep 2017 22:48:04 +0000 (00:48 +0200)]
Add include file to fix errors in multigrid tests

7 years agoFixed compilation issue in serial. 4852/head
Luca Heltai [Fri, 15 Sep 2017 22:44:25 +0000 (00:44 +0200)]
Fixed compilation issue in serial.

7 years agoMerge pull request #5094 from bangerth/update-test
Matthias Maier [Fri, 15 Sep 2017 22:19:26 +0000 (17:19 -0500)]
Merge pull request #5094 from bangerth/update-test

Increase precision with which we output test results.

7 years agoIncrease precision with which we output test results. 5094/head
Wolfgang Bangerth [Fri, 15 Sep 2017 21:44:17 +0000 (15:44 -0600)]
Increase precision with which we output test results.

7 years agoUnify the hp and non-hp implementations of a function. 5093/head
Wolfgang Bangerth [Wed, 13 Sep 2017 21:12:31 +0000 (15:12 -0600)]
Unify the hp and non-hp implementations of a function.

7 years agoImplement set_dof_indices() also for the hp case.
Wolfgang Bangerth [Wed, 13 Sep 2017 19:46:51 +0000 (13:46 -0600)]
Implement set_dof_indices() also for the hp case.

This is a trivial copy of the non-hp case as long as we provide the
appropriate active_fe_index.

7 years agoUse DoFInvalidAccessor to unify three partial specializations into one.
Wolfgang Bangerth [Wed, 13 Sep 2017 18:46:29 +0000 (12:46 -0600)]
Use DoFInvalidAccessor to unify three partial specializations into one.

7 years agoChangelog.
Luca Heltai [Tue, 12 Sep 2017 11:49:09 +0000 (13:49 +0200)]
Changelog.

7 years agoMoved options to AdditionalData. Fixed doc.
Luca Heltai [Tue, 12 Sep 2017 11:43:43 +0000 (13:43 +0200)]
Moved options to AdditionalData. Fixed doc.

7 years agoUse GrowingVectorMemory in IDA + example in doc.
Luca Heltai [Fri, 8 Sep 2017 14:45:02 +0000 (16:45 +0200)]
Use GrowingVectorMemory in IDA + example in doc.

7 years agoRenamed IDAInterface to IDA.
Luca Heltai [Wed, 6 Sep 2017 12:38:46 +0000 (14:38 +0200)]
Renamed IDAInterface to IDA.

7 years agoMore sensible defaults, and document optional functions.
Luca Heltai [Wed, 6 Sep 2017 12:22:03 +0000 (14:22 +0200)]
More sensible defaults, and document optional functions.

7 years agoRenamed reset_dae and improved documentation.
Luca Heltai [Wed, 6 Sep 2017 11:33:36 +0000 (13:33 +0200)]
Renamed reset_dae and improved documentation.

7 years agoAdded AssertIDA macro.
Luca Heltai [Wed, 6 Sep 2017 11:32:56 +0000 (13:32 +0200)]
Added AssertIDA macro.

7 years agoAdded quicktest.
Luca Heltai [Tue, 5 Sep 2017 14:26:26 +0000 (16:26 +0200)]
Added quicktest.

7 years agoStarting point for SUNDIALS IDA interface.
Luca Heltai [Mon, 14 Aug 2017 23:25:03 +0000 (17:25 -0600)]
Starting point for SUNDIALS IDA interface.

7 years agoMerge pull request #5052 from Rombur/python_triangulation
Denis Davydov [Fri, 15 Sep 2017 12:20:45 +0000 (14:20 +0200)]
Merge pull request #5052 from Rombur/python_triangulation

Python wrappers

7 years agoMerge pull request #5087 from drwells/timer-multithreaded-fixes
Luca Heltai [Fri, 15 Sep 2017 12:09:34 +0000 (14:09 +0200)]
Merge pull request #5087 from drwells/timer-multithreaded-fixes

Timer multithreaded fixes

7 years agoMerge pull request #5091 from bangerth/doc-update
Luca Heltai [Fri, 15 Sep 2017 12:06:56 +0000 (14:06 +0200)]
Merge pull request #5091 from bangerth/doc-update

Fix grammar.

7 years agoFix default definitions in header files
Daniel Arndt [Fri, 15 Sep 2017 07:56:57 +0000 (09:56 +0200)]
Fix default definitions in header files

7 years agoMove default definitions to declarations
Daniel Arndt [Thu, 14 Sep 2017 21:58:05 +0000 (23:58 +0200)]
Move default definitions to declarations

7 years agoMerge pull request #5083 from masterleinad/replace_single_character
Daniel Arndt [Thu, 14 Sep 2017 23:02:28 +0000 (01:02 +0200)]
Merge pull request #5083 from masterleinad/replace_single_character

Replace single character strings

7 years agoFix grammar. 5091/head
Wolfgang Bangerth [Thu, 14 Sep 2017 22:13:31 +0000 (16:13 -0600)]
Fix grammar.

7 years agoDefault constructors and destructors
Daniel Arndt [Tue, 12 Sep 2017 13:56:29 +0000 (15:56 +0200)]
Default constructors and destructors

7 years agoMerge pull request #5089 from tjhei/fix_boost_serialize_header_missing_2
Wolfgang Bangerth [Thu, 14 Sep 2017 20:11:19 +0000 (14:11 -0600)]
Merge pull request #5089 from tjhei/fix_boost_serialize_header_missing_2

second try in fixing boost serialization missing header

7 years agosecond try in fixing boost serialization missing header 5089/head
Timo Heister [Thu, 14 Sep 2017 20:01:34 +0000 (16:01 -0400)]
second try in fixing boost serialization missing header

7 years agoMerge pull request #5055 from masterleinad/move_finite_element
Wolfgang Bangerth [Thu, 14 Sep 2017 19:55:57 +0000 (13:55 -0600)]
Merge pull request #5055 from masterleinad/move_finite_element

Implement move constructors for FiniteElement and FESystem

7 years agoMerge pull request #5075 from bangerth/invalid-accessor
Matthias Maier [Thu, 14 Sep 2017 19:52:21 +0000 (14:52 -0500)]
Merge pull request #5075 from bangerth/invalid-accessor

Introduce a class that can't be used.

7 years agoExit the given subsection in TimerOutput::Scope. 5087/head
David Wells [Thu, 14 Sep 2017 18:24:29 +0000 (14:24 -0400)]
Exit the given subsection in TimerOutput::Scope.

The current implementation doesn't work in a multithreaded context.
Consider the following sequence of events:

Thread 1: start and create Scope scope_1(timer_output, "1")
Thread 2: start and create Scope scope_2(timer_output, "2")
Thread 1: call ~scope_1() and join
Thread 2: call ~scope_2() and join

The current implementation of ~Scope() exits the most recent subsection,
so when ~scope_1() is called we leave subsection "2" and when ~scope_2()
is called we leave subsection "1". We can get around this by always
explicitly exiting the subsection in which we started.

7 years agoUse last lap times for TimerOutput accumulation.
David Wells [Thu, 14 Sep 2017 18:22:22 +0000 (14:22 -0400)]
Use last lap times for TimerOutput accumulation.

The methods Timer::wall_time() and Timer::cpu_time() (i.e.,
Timer::operator()()) return cumulative times instead of times over the
last lap.

7 years agoMerge pull request #5026 from masterleinad/variadic_constructor_fe_system
Wolfgang Bangerth [Thu, 14 Sep 2017 17:51:31 +0000 (11:51 -0600)]
Merge pull request #5026 from masterleinad/variadic_constructor_fe_system

Variadic constructor for FESystem

7 years agoMerge pull request #5071 from masterleinad/fix_clang_5_0_0
Wolfgang Bangerth [Thu, 14 Sep 2017 17:47:29 +0000 (11:47 -0600)]
Merge pull request #5071 from masterleinad/fix_clang_5_0_0

Fix warnings for clang-5.0.0

7 years agoMerge pull request #5081 from masterleinad/use_const_ref
Wolfgang Bangerth [Thu, 14 Sep 2017 17:46:59 +0000 (11:46 -0600)]
Merge pull request #5081 from masterleinad/use_const_ref

Use const& instead of const where applicable

7 years agoMerge pull request #5086 from tjhei/fix_boost_serialize_header_missing
Wolfgang Bangerth [Thu, 14 Sep 2017 17:23:00 +0000 (11:23 -0600)]
Merge pull request #5086 from tjhei/fix_boost_serialize_header_missing

add missing header file needed for boost 1.65

7 years agoadd missing header file needed for boost 1.65 5086/head
Timo Heister [Thu, 14 Sep 2017 17:20:29 +0000 (13:20 -0400)]
add missing header file needed for boost 1.65

7 years agoMerge pull request #5084 from GivAlz/ErrorPoint
Wolfgang Bangerth [Thu, 14 Sep 2017 14:49:20 +0000 (08:49 -0600)]
Merge pull request #5084 from GivAlz/ErrorPoint

Corrected error in documentation of point input operator

7 years agoCorrected error in documentation 5084/head
GivAlz [Thu, 14 Sep 2017 16:44:12 +0000 (16:44 +0000)]
Corrected error in documentation

7 years agoMerge pull request #5082 from masterleinad/use_nullptr
Wolfgang Bangerth [Thu, 14 Sep 2017 14:11:47 +0000 (08:11 -0600)]
Merge pull request #5082 from masterleinad/use_nullptr

Use nullptr instead of NULL

7 years agoMerge pull request #5068 from bangerth/hp-fixes
Timo Heister [Thu, 14 Sep 2017 13:44:19 +0000 (09:44 -0400)]
Merge pull request #5068 from bangerth/hp-fixes

More parallel hp fixes

7 years agoReplace single character strings 5083/head
Daniel Arndt [Thu, 14 Sep 2017 13:36:17 +0000 (15:36 +0200)]
Replace single character strings

7 years agoUse nullptr instead of NULL 5082/head
Daniel Arndt [Thu, 14 Sep 2017 13:35:31 +0000 (15:35 +0200)]
Use nullptr instead of NULL

7 years agoUse const& instead of const where applicable 5081/head
Daniel Arndt [Thu, 14 Sep 2017 13:34:30 +0000 (15:34 +0200)]
Use const& instead of const where applicable

7 years agoMerge pull request #5079 from bangerth/doc-update
Timo Heister [Thu, 14 Sep 2017 13:39:54 +0000 (09:39 -0400)]
Merge pull request #5079 from bangerth/doc-update

Update the C++11 page.

7 years agoUpdate the C++11 page. 5079/head
Wolfgang Bangerth [Thu, 14 Sep 2017 13:35:18 +0000 (07:35 -0600)]
Update the C++11 page.

7 years agoMerge pull request #5070 from bangerth/prep-work
Daniel Arndt [Thu, 14 Sep 2017 13:13:53 +0000 (15:13 +0200)]
Merge pull request #5070 from bangerth/prep-work

Prep work

7 years agoMerge pull request #5065 from bangerth/fix-richardson
Daniel Arndt [Thu, 14 Sep 2017 07:30:59 +0000 (09:30 +0200)]
Merge pull request #5065 from bangerth/fix-richardson

Avoid raw pointers in favor of VectorMemory::Pointer in SolverRichardson.

7 years agoMerge pull request #5076 from bangerth/simplify
Denis Davydov [Thu, 14 Sep 2017 06:16:37 +0000 (08:16 +0200)]
Merge pull request #5076 from bangerth/simplify

Simplify some function calls now that we have hp::DoFHandler::get_fe(index)

7 years agoSimplify some function calls now that we have hp::DoFHandler::get_fe(index). 5076/head
Wolfgang Bangerth [Wed, 13 Sep 2017 22:12:36 +0000 (16:12 -0600)]
Simplify some function calls now that we have hp::DoFHandler::get_fe(index).

7 years agoFix warnings for clang-5.0.0 5071/head
Daniel Arndt [Wed, 13 Sep 2017 16:00:16 +0000 (18:00 +0200)]
Fix warnings for clang-5.0.0

7 years agoUpdate some documentation. 5075/head
Wolfgang Bangerth [Wed, 13 Sep 2017 18:45:49 +0000 (12:45 -0600)]
Update some documentation.

7 years agoIntroduce a class that can't be used.
Wolfgang Bangerth [Wed, 13 Sep 2017 18:45:34 +0000 (12:45 -0600)]
Introduce a class that can't be used.

Specifically, declare DoFInvalidAccessor that is the accessor
for cases where dim>spacedim -- i.e., things that can't logically
happen, but that at times do happen in code like

  for (quad=0; quad<GeometryInfo<dim>::quads_per_cell; ++quad)
    cell->quad(quad)->do_something();

Here, the code is not executed in 1d, but we want it to be syntactically
correct so that we can compile the function. Having a DoFInvalidAccessor
then serves the same purpose that InvalidAccessor already does for
tria accessor functions: such objects cannot be created but rather
throw an exception, but they provide the correct syntax.

7 years agoMerge pull request #5066 from tamiko/bzip2_dir
Timo Heister [Wed, 13 Sep 2017 17:42:30 +0000 (13:42 -0400)]
Merge pull request #5066 from tamiko/bzip2_dir

CMake: Respect BZIP2_DIR in FindBZIP2.cmake

7 years agoMake the set_dof_indices() function more general. 5070/head
Wolfgang Bangerth [Wed, 13 Sep 2017 03:08:02 +0000 (21:08 -0600)]
Make the set_dof_indices() function more general.

7 years agoWrap a bunch of comments.
Wolfgang Bangerth [Tue, 12 Sep 2017 22:48:05 +0000 (16:48 -0600)]
Wrap a bunch of comments.

7 years agoAdd a changelog entry. 5065/head
Wolfgang Bangerth [Wed, 13 Sep 2017 15:32:20 +0000 (09:32 -0600)]
Add a changelog entry.

7 years agoAvoid raw pointers in favor of VectorMemory::Pointer.
Wolfgang Bangerth [Tue, 12 Sep 2017 01:03:29 +0000 (19:03 -0600)]
Avoid raw pointers in favor of VectorMemory::Pointer.

7 years agoRemove an unused variable.
Wolfgang Bangerth [Tue, 12 Sep 2017 00:45:48 +0000 (18:45 -0600)]
Remove an unused variable.

7 years agoMake SolverRichardson::criterion() be self contained.
Wolfgang Bangerth [Tue, 12 Sep 2017 00:44:42 +0000 (18:44 -0600)]
Make SolverRichardson::criterion() be self contained.

Specifically, pass everything the function needs as argument. Also make it 'const'
by not letting it set a variable that is otherwise never read anywhere.

7 years agoRemove an unnecessary include file.
Wolfgang Bangerth [Tue, 12 Sep 2017 00:37:09 +0000 (18:37 -0600)]
Remove an unnecessary include file.

7 years agoMerge pull request #5069 from bangerth/doc-updates
Timo Heister [Wed, 13 Sep 2017 14:53:42 +0000 (10:53 -0400)]
Merge pull request #5069 from bangerth/doc-updates

Doc updates

7 years agoAdd to the documentation. 5069/head
Wolfgang Bangerth [Wed, 13 Sep 2017 13:44:13 +0000 (07:44 -0600)]
Add to the documentation.

7 years agoExplain a code example better.
Wolfgang Bangerth [Wed, 13 Sep 2017 13:42:15 +0000 (07:42 -0600)]
Explain a code example better.

7 years agoFix a bug in hp DoF unification. 5068/head
Wolfgang Bangerth [Tue, 12 Sep 2017 22:47:30 +0000 (16:47 -0600)]
Fix a bug in hp DoF unification.

Specifically, in the first phase of DoF distribution, we only
enumerate DoF indices on locally owned cells. Thus, after
unification when we renumber, we need to ignore DoFs on
ghost cells. In that case, we need to pass the correct
'check_validity' flag to the renumbering routines.

7 years agoLimit renumbering hp DoFs to non-artificial cells.
Wolfgang Bangerth [Tue, 12 Sep 2017 19:42:59 +0000 (13:42 -0600)]
Limit renumbering hp DoFs to non-artificial cells.

7 years agoLimit updating DoF indices to cells where this is possible.
Wolfgang Bangerth [Tue, 12 Sep 2017 19:40:57 +0000 (13:40 -0600)]
Limit updating DoF indices to cells where this is possible.

7 years agoMerge pull request #5062 from bangerth/convert-arrayview
Martin Kronbichler [Wed, 13 Sep 2017 07:00:00 +0000 (09:00 +0200)]
Merge pull request #5062 from bangerth/convert-arrayview

Automatically allow converting std::vector to ArrayView.

7 years agoMerge pull request #5067 from bangerth/hp-fixes
Martin Kronbichler [Wed, 13 Sep 2017 06:57:19 +0000 (08:57 +0200)]
Merge pull request #5067 from bangerth/hp-fixes

Two small parallel hp fixes

7 years agoMerge pull request #5064 from bangerth/cleanup-logstream
Bruno Turcksin [Tue, 12 Sep 2017 21:14:23 +0000 (17:14 -0400)]
Merge pull request #5064 from bangerth/cleanup-logstream

Some minor cleanups of LogStream.

7 years agoMerge pull request #5058 from tjhei/fix_readwritevector_test
Bruno Turcksin [Tue, 12 Sep 2017 21:12:44 +0000 (17:12 -0400)]
Merge pull request #5058 from tjhei/fix_readwritevector_test

fix tests/readwritevector_0x

7 years agoOnly update DoF indices on active cells in the non-MG renumbering. 5067/head
Wolfgang Bangerth [Tue, 12 Sep 2017 18:56:48 +0000 (12:56 -0600)]
Only update DoF indices on active cells in the non-MG renumbering.

7 years agoDo not set directly active_fe_indices on ghost cells.
Wolfgang Bangerth [Tue, 12 Sep 2017 18:54:00 +0000 (12:54 -0600)]
Do not set directly active_fe_indices on ghost cells.

7 years agoCMake: Respect BZIP2_DIR in FindBZIP2.cmake 5066/head
Matthias Maier [Tue, 12 Sep 2017 15:45:51 +0000 (10:45 -0500)]
CMake: Respect BZIP2_DIR in FindBZIP2.cmake

7 years agoAdd changelog entry. 5062/head
Wolfgang Bangerth [Mon, 11 Sep 2017 23:24:07 +0000 (17:24 -0600)]
Add changelog entry.

7 years agoAdd test.
Wolfgang Bangerth [Mon, 11 Sep 2017 23:23:59 +0000 (17:23 -0600)]
Add test.

7 years agoAutomatically allow converting std::vector to ArrayView.
Wolfgang Bangerth [Mon, 11 Sep 2017 23:23:48 +0000 (17:23 -0600)]
Automatically allow converting std::vector to ArrayView.

7 years agoSome minor cleanups of LogStream. 5064/head
Wolfgang Bangerth [Tue, 12 Sep 2017 12:37:58 +0000 (06:37 -0600)]
Some minor cleanups of LogStream.

In particular, move some functions into the .cc file -- surely, these
functions do not need to be 'inline' in the header file.

7 years agoMerge pull request #5061 from bangerth/fix-minres
Daniel Arndt [Tue, 12 Sep 2017 08:39:19 +0000 (10:39 +0200)]
Merge pull request #5061 from bangerth/fix-minres

Avoid raw pointers in favor of VectorMemory::Pointer in SolverMinRes.

7 years agoMerge pull request #5060 from bangerth/fix-grammar
Timo Heister [Tue, 12 Sep 2017 01:13:00 +0000 (21:13 -0400)]
Merge pull request #5060 from bangerth/fix-grammar

Fix grammar in documentation.


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