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Node:Ignoring Changes, Next:, Previous:Time Stamp Order, Up:Shortcomings

Ignoring Certain Changes

It would be nice to have a feature for specifying two strings, one in from-file and one in to-file, which should be considered to match. Thus, if the two strings are foo and bar, then if two lines differ only in that foo in file 1 corresponds to bar in file 2, the lines are treated as identical.

It is not clear how general this feature can or should be, or what syntax should be used for it.

A partial substitute is to filter one or both files before comparing, e.g.:

sed 's/foo/bar/g' file1 | diff - file2

However, this outputs the filtered text, not the original.


 
 
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