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Help: Add cmake-language.7 manual
Help: Reference cmake-language.7 comment docs from cmake-developer.7

The cmake-language.7 manual now documents comment syntax.  Reference it
from cmake-developer.7 when discussing how to add comment-enclosed
documentation to modules.
Merge topic 'doc-cmake-language' into next

79fd233 Help: Reference cmake-language.7 comment docs from cmake-developer.7
a931ee4 Help: Add cmake-language.7 manual
4d76bcc CMake Nightly Date Stamp