Line Filtering
From WinMerge Development Wiki
Line filtering is run while two files are compared. Line filtering scans found differences and matches lines inside them. In 2.8 stable version it is required that all lines in the difference match the regular expression before the difference is ignored. That seriously limits usability.
There are three main use cases for the line filtering:
- ignore the whole difference if one line in difference matches the filter (in both sides?)
- ignore just the line(s) that match the filter, possibly splitting difference to two or more new differences
- ignore the difference if all the lines match the filter (current behavior)

