I'm trying to use the find/"adding/removing string"/regular expression option in gitk. The syntaxes I have tried don't work, and I can find no docs that describe the syntax of the regular expressions it accepts.
I'm trying to match both Modem_Wakup and Modem_UnWakeup.  Neither Modem_(Un)?Wakeup nor
Modem_\(Un\)?Wakeup, nor Modem_\(Un\)\?Wakeup, nor any other obvious ones work.  I can find the strings individually, so I know there should be matches.
So what syntax does it use?
 
     
    