Extend indent to changelog files

contrib/utilities/indent

@@ -140,8 +140,17 @@ find tests include source benchmarks cookbooks unit_tests \
   | xargs -P 10 -I {} bash -c "indent_file {}"
 
 
+# Find all source files that should be checked for invalid characters
+# and other unwanted formatting options. This includes more
+# files than the ones indented by astyle above (e.g. documentation source
+# files). Prints all file names separated by a NULL character (\0).
+find_source_files() {
+  find include source unit_tests cookbooks benchmarks doc \( -name '*.cc' -o -name '*.h' -o -name '*.prm' -o -name '*.h.in' -o -name 'CMakeLists.txt' -o -name '*.cmake' -o -name '*.md' -o -wholename '*modules/changes/*' \) -print0
+}
+export -f find_source_files
+
 # remove execute permission on source files:
-find tests include source benchmarks cookbooks unit_tests \( -name '*.cc' -o -name '*.h' -o -name '*.prm' \) -print | xargs -n 50 -P 10 chmod -x
+find_source_files | xargs -0 -n 50 -P 10 chmod -x
 
 # convert dos formatted files to unix file format by stripping out
 # carriage returns (15=0x0D):
@@ -156,7 +165,7 @@ dos_to_unix()
     fi
 }
 export -f dos_to_unix
-find tests include source unit_tests cookbooks benchmarks doc \( -name '*.cc' -o -name '*.h' -o -name '*.prm' -o -name '*.h.in' -o -name '*.md' \) -print | xargs -P 10 -I {} bash -c 'dos_to_unix "$@"' _ {}
+find_source_files | xargs -0 -P 10 -I {} bash -c 'dos_to_unix "$@"' _ {}
 
 # convert tabs to two spaces:
 tab_to_space()
@@ -169,7 +178,7 @@ tab_to_space()
     rm -f $f.tmp
 }
 export -f tab_to_space
-find tests include source unit_tests cookbooks benchmarks doc \( -name '*.cc' -o -name '*.h' -o -name '*.prm' -o -name '*.h.in' -o -name 'CMakeLists.txt' -o -name '*.cmake' -o -name '*.md' \) -print | xargs -P 10 -I {} bash -c 'tab_to_space "$@"' _ {}
+find_source_files | xargs -0 -P 10 -I {} bash -c 'tab_to_space "$@"' _ {}
 
 # Remove trailing whitespace from files
 remove_trailing_whitespace()
@@ -182,7 +191,7 @@ remove_trailing_whitespace()
     rm -f $f.tmp
 }
 export -f remove_trailing_whitespace
-find tests include source unit_tests cookbooks benchmarks doc \( -name '*.cc' -o -name '*.h' -o -name '*.prm' -o -name '*.h.in' -o -name 'CMakeLists.txt' -o -name '*.cmake' -o -name '*.md' \) -print | xargs -P 10 -I {} bash -c 'remove_trailing_whitespace "$@"' _ {}
+find_source_files | xargs -0 -P 10 -I {} bash -c 'remove_trailing_whitespace "$@"' _ {}
 
 
 # Ensure only a single newline at end of files
@@ -209,7 +218,7 @@ ensure_single_trailing_newline()
   rm -f $f.tmp $f.tmpi
 }
 export -f ensure_single_trailing_newline
-find include source unit_tests cookbooks benchmarks doc \( -name '*.cc' -o -name '*.h' -o -name '*.prm' -o -name '*.h.in' -o -name 'CMakeLists.txt' -o -name '*.cmake' -o -name '*.md' \) -print | xargs -P 10 -I {} bash -c 'ensure_single_trailing_newline "$@"' _ {}
+find_source_files | xargs -0 -P 10 -I {} bash -c 'ensure_single_trailing_newline "$@"' _ {}
 
 # Do not recursively search the tests directory for prm files, otherwise the output prms will be changed
 find tests \( -name '*.cc' -o -name '*.h' -o -name '*.h.in' -o -name 'CMakeLists.txt' -o -name '*.cmake' \) -print | xargs -P 10 -I {} bash -c 'ensure_single_trailing_newline "$@"' _ {}