Merge topic 'minor-help-cleanup'

7eef823e Help: Add comma to assist parsing of ctest_build command docs.
5fb9b16d Help: Document that file(GENERATE) re-writes only when needed.
95135ac3 Help: Add missing external link marker.

Help/command/ctest_build.rst

@@ -23,7 +23,7 @@ The APPEND option marks results for append to those previously
 submitted to a dashboard server since the last ctest_start.  Append
 semantics are defined by the dashboard server in use.
 
-If set the contents of the variable CTEST_BUILD_FLAGS are passed as
+If set, the contents of the variable CTEST_BUILD_FLAGS are passed as
 additional arguments to the underlying build command. This can e.g. be
 used to trigger a parallel build using the -j option of make. See
 :module:`ProcessorCount` for an example.

Help/command/file.rst

@@ -271,6 +271,8 @@ from the input content to produce the output content.  The options are:
 
 Exactly one ``CONTENT`` or ``INPUT`` option must be given.  A specific
 ``OUTPUT`` file may be named by at most one invocation of ``file(GENERATE)``.
+Generated files are modified on subsequent cmake runs only if their content
+is changed.
 
 ------------------------------------------------------------------------------
 

Help/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.rst

@@ -185,7 +185,7 @@ The features known to this version of CMake are:
   .. _N3050: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.html
 
 ``cxx_nonstatic_member_init``
-  Non-static data member initialization, as defined in N2756.
+  Non-static data member initialization, as defined in N2756_.
 
   .. _N2756: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2756.htm