Small typo fix
Help: Fix typo

 binary_find -> binary_search.
include_directory: Add missing include.

The cmGeneratorExpression is used here, but the header for it is not
in the include heirarchy.  This would be a compile error if the file
were compiled as a standalone translation unit, but it is instead
used in a mini-unity-build by inclusion in cmCommands.cxx. The header
for cmGeneratorExpression happens to be included first, so the
compilation works fine.

IDEs do not know this however, and flag the use as an error.
cmGlobalGenerator: Remove unused variable.
Makefile: Fix comment indentation.
Merge topic 'minor-cleanups' into next

c0ea4c5c Makefile: Fix comment indentation.
5e0c73c7 cmGlobalGenerator: Remove unused variable.
907c09cd include_directory: Add missing include.
a74d125a Help: Fix typo
317d8498 Small typo fix