The wording here was just awkward: TRUE is returned if... Note that
FALSE is also returned if...
* This function is useful when matching key events against
* accelerators.
*
- * Returns: %TRUE if no virtual modifiers were mapped to the
+ * Returns: %FALSE if two virtual modifiers were mapped to the
* same non-virtual modifier. Note that %FALSE is also returned
* if a virtual modifier is mapped to a non-virtual modifier that
* was already set in @state.