Manual:CleanupWatchlist.php

Details
cleanupWatchlist.php file is a maint-scripts>Special:MyLanguage/Manual:Maintenance scripts|maintenance script to clean up broken, unparseable titles in the watchlist.

Options
cleanupWatchlist.php accepts only one options.

Usage
It will only count the number of possible updates and output the result, without fixing the value. If you want to actually cleans up watchlist then use command with --fix.