======Synopsis:======
[[on]] [#][<mode>]mode_stripped [<serial#>] [-|^]<match> { <action> }

======Description:======
This hook is similar to the [[on MODE|MODE]] hook, except it only hooks a single
mode change at a time.  This hook relies on [[set MODE_STRIPPER|MODE_STRIPPER]] being turned
on.  It is mostly useful in scripts that wish to evaluate each
individual mode change.

======Parameters:======
|$0    |nickname of person issuing mode change |
|$1    |channel or nickname affected by mode change |
|$2    |mode changed |
|$3    |argument to the mode (does not apply to all modes) |

======Other Notes:======
This hook does not override the [[on MODE|MODE]] hook; rather, they compliment
each other.