Merge topic 'documentation-cleanup'

4ad0233 Remove period at the end of the check message.
50b1ea5 Fix minor typos.
19c3206 Remove unused parameter marker and the unused parameter.
9d462b2 Document that generator expressions can be used in target properties.
daf88c3 Fix punctuation in some variables documentation.
3172cde Fix the layout of the generator expression documentation.

Modules/CheckIncludeFiles.cmake

@@ -71,7 +71,7 @@ macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE)
         "exist passed with the following output:\n"
         "${OUTPUT}\n\n")
     else()
-      message(STATUS "Looking for ${_description} - not found.")
+      message(STATUS "Looking for ${_description} - not found")
       set(${VARIABLE} "" CACHE INTERNAL "Have includes ${INCLUDE}")
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
         "Determining if files ${INCLUDE} "

Modules/CheckSymbolExists.cmake

@@ -89,7 +89,7 @@ macro(_CHECK_SYMBOL_EXISTS SOURCEFILE SYMBOL FILES VARIABLE)
         "${OUTPUT}\nFile ${SOURCEFILE}:\n"
         "${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
     else()
-      message(STATUS "Looking for ${SYMBOL} - not found.")
+      message(STATUS "Looking for ${SYMBOL} - not found")
       set(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
         "Determining if the ${SYMBOL} "