STYLE: fix line length issue

Source/cmListFileCache.cxx

@@ -144,7 +144,8 @@ bool cmListFile::ParseFile(const char* filename,
       {
         mf->AddCacheDefinition
           ("CMAKE_BACKWARDS_COMPATIBILITY", "2.5",
-           "For backwards compatibility, what version of CMake commands and "
+           "For backwards compatibility, what version of CMake "
+           "commands and "
            "syntax should this version of CMake try to support.",
            cmCacheManager::STRING);
       }
@@ -172,7 +173,8 @@ bool cmListFile::ParseFile(const char* filename,
       {
         mf->AddCacheDefinition
           ("CMAKE_BACKWARDS_COMPATIBILITY", "2.5",
-           "For backwards compatibility, what version of CMake commands and "
+           "For backwards compatibility, what version of CMake "
+           "commands and "
            "syntax should this version of CMake try to support.",
            cmCacheManager::INTERNAL);
       }