Minor changes to examples comments

diff --git a/examples/step-15/step-15.cc b/examples/step-15/step-15.cc
index 469ff2c32176835d5fda40184acc7066e4d8a9b9..09e5c42693ca2f77cc123af2e4eb2507d2f51cea 100644 (file)
--- a/examples/step-15/step-15.cc
+++ b/examples/step-15/step-15.cc
@@ -551,7 +551,7 @@ namespace Step15
     // fixed, they are of course no "real" degrees of freedom and so, strictly
     // speaking, we shouldn't have assembled entries in the residual vector
     // for them. However, as we always do, we want to do exactly the same
-    // thing on every cell and so we didn't not want to deal with the question
+    // thing on every cell and so we didn't want to deal with the question
     // of whether a particular degree of freedom sits at the boundary in the
     // integration above. Rather, we will simply set to zero these entries
     // after the fact. To this end, we need to determine which degrees

diff --git a/examples/step-17/step-17.cc b/examples/step-17/step-17.cc
index 144606dde93ece8fcae0511ef370306476748aa5..a6da2c42e519bde6c7726f3c3711fb067126b17e 100644 (file)
--- a/examples/step-17/step-17.cc
+++ b/examples/step-17/step-17.cc
@@ -561,7 +561,7 @@ namespace Step17
     // <i>not</i> want to make the matrix symmetric is because this
     // would require us to write into column entries that actually
     // reside on other processes, i.e., it involves communicating
-    // data. This is always expensive.
+    // data.
     //
     // Experience tells us that CG also works (and works almost as
     // well) if we don't remove the columns associated with boundary