The introspection annotation for gtk_im_context_get_surrounding
was missing a :.
* string of text holding context around the insertion point.
* If the function returns %TRUE, then you must free the result
* stored in this location with g_free().
- * @cursor_index: (out) location to store byte index of the insertion
+ * @cursor_index: (out): location to store byte index of the insertion
* cursor within @text.
*
* Retrieves context around the insertion point. Input methods