is there any plugin for comparing text files by content? Something which would tell me which line was added, deleted or changed? Basically, I am looking for a FAR plugin version of e.g. WinMerge or Total Commander's Compare By Content.
Try DiffUtils with command in UserMenu like this:
edit:<diff.exe -c -p -r "!^!\!^!.!" "!#!\!#!.!"
(comparing file under cursor on active panel with file under cursor on passive panel). Look best with "colorer" plugin.
TwoEdit looks about right. I'll have to do some more testing to fully understand its features (my russian is very rusty to understand the docs), but it could be just the thing I am looking for. Thanks!