cmLocalGenerator: fix quoting in generated script

Source/cmLocalGenerator.cxx

@@ -2946,7 +2946,7 @@ void cmLocalGenerator::CopyPchCompilePdb(
 
     file << "foreach(retry RANGE 1 30)\n";
     file << "  if (EXISTS \"" << from_file << "\" AND (NOT EXISTS \""
-         << dest_file << "\" OR NOT \"" << dest_file << "  \" IS_NEWER_THAN \""
+         << dest_file << "\" OR NOT \"" << dest_file << "\" IS_NEWER_THAN \""
          << from_file << "\"))\n";
     file << "    execute_process(COMMAND ${CMAKE_COMMAND} -E copy";
     file << " \"" << from_file << "\""