Avoid generating an accidental UDL suffix

In the error case, we previously output a pragma with a string immediately
followed by __FILE__ - but with no space between the string terminator and
__FILE__, a compliant C++ compiler can interpret this as a user-defined literal
suffix and end up failing to embed the intended information. We should add
spaces here to ensure our generated code is standards-compliant.

tools/cef_parser.py

@@ -234,7 +234,7 @@ def format_translation_changes(old, new):
               '\n  //   NOW: '+new['retval']
 
   if changed:
-    result += '\n  #pragma message("Warning: "__FILE__": '+new['name']+ \
+    result += '\n  #pragma message("Warning: " __FILE__ ": '+new['name']+ \
               ' prototype has changed")\n'
 
   return result

tools/make_cpptoc_impl.py

@@ -71,7 +71,7 @@ def make_cpptoc_function_impl_new(cls, name, func, defined_names, base_scoped):
     result += '\n  // BEGIN DELETE BEFORE MODIFYING'
     result += '\n  // AUTO-GENERATED CONTENT'
     result += '\n  // COULD NOT IMPLEMENT DUE TO: ' + ', '.join(invalid)
-    result += '\n  #pragma message("Warning: "__FILE__": ' + name + ' is not implemented")'
+    result += '\n  #pragma message("Warning: " __FILE__ ": ' + name + ' is not implemented")'
     result += '\n  // END DELETE BEFORE MODIFYING'
     result += '\n}\n\n'
     return result

tools/make_ctocpp_impl.py

@@ -104,7 +104,7 @@ def make_ctocpp_function_impl_new(clsname, name, func, base_scoped):
     result += '\n  // BEGIN DELETE BEFORE MODIFYING'
     result += '\n  // AUTO-GENERATED CONTENT'
     result += '\n  // COULD NOT IMPLEMENT DUE TO: ' + ', '.join(invalid)
-    result += '\n  #pragma message("Warning: "__FILE__": ' + name + ' is not implemented")'
+    result += '\n  #pragma message("Warning: " __FILE__ ": ' + name + ' is not implemented")'
     result += '\n  // END DELETE BEFORE MODIFYING'
     result += '\n}\n\n'
     return result

tools/translator.README.txt

@@ -30,7 +30,7 @@ output file.
    // WARNING - CHANGED RETURN VALUE
    //   WAS: void
    //   NOW: int
-   #pragma message("Warning: "__FILE__": MyFunction prototype has changed")
+   #pragma message("Warning: " __FILE__ ": MyFunction prototype has changed")
 
 Auto-generated implementations will be added in the new output file for any
 methods/functions that exist in the CEF header file but did not exist in the
@@ -43,7 +43,7 @@ implementation manually.
    {
      // BEGIN DELETE BEFORE MODIFYING
      // AUTO-GENERATED CONTENT
-     #pragma message("Warning: "__FILE__": frame_new_func is not implemented")
+     #pragma message("Warning: " __FILE__ ": frame_new_func is not implemented")
      // END DELETE BEFORE MODIFYING
    }