Documentation fix and whitespace cleanup

- gtk_init() does not parse command-line options anymore.
- Gitlab's  WebIDE automatically cleans up whitespace.

gtk/gtkmain.c

@@ -622,7 +622,7 @@ gtk_init_check (void)
  *
  * Call this function before using any other GTK functions in your GUI
  * applications.  It will initialize everything needed to operate the
- * toolkit and parses some standard command line options.
+ * toolkit.
  *
  * If you are using `GtkApplication`, you don't have to call gtk_init()
  * or gtk_init_check(); the `GApplication::startup` handler