Do not handle --word-diff or --color-words output #807
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Fixes #440 Ref #152
Delta does not understand
--word-diff
nor--color-words
output. As a first step towards improving what delta offers regarding "squashed diffs", this PR stops delta doing anything at all to these forms of output from git.The detection is by inspecting the parent process, so it won't work in general when input is piped to delta, but it will work when delta is configured as git's pager.