Remove CMake-language block-end command arguments

Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block.  This is no longer the preferred style.

Run the following shell code:

for c in else endif endforeach endfunction endmacro endwhile; do
    echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed

Tests/Tutorial/Step7/CMakeLists.txt

@@ -29,7 +29,7 @@ if (USE_MYMATH)
   include_directories ("${PROJECT_SOURCE_DIR}/MathFunctions")
   add_subdirectory (MathFunctions)
   set (EXTRA_LIBS ${EXTRA_LIBS} MathFunctions)
-endif (USE_MYMATH)
+endif ()
 
 # add the executable
 add_executable (Tutorial tutorial.cxx)
@@ -59,7 +59,7 @@ macro (do_test arg result)
   set_tests_properties (TutorialComp${arg}
     PROPERTIES PASS_REGULAR_EXPRESSION ${result}
     )
-endmacro (do_test)
+endmacro ()
 
 # do a bunch of result based tests
 do_test (4 "4 is 2")