Fix TestFilesystem::read_dir_diff_paths #38
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This function collects the files present in the `left` and `right` directories. It should return the path suffix with the `left` and `right` prefix stripped. This is necessary because `process_opts` will add the `left` and `right` prefix back to the paths returned by `read_dir_diff_paths`. If we don't strip the prefix, we will end up with invalid paths where the prefix is duplicated. This went unnoticed since the current tests don't diff directories. I will add a test that diffs directories in a subsequent commit.
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This function collects the files present in the
leftandrightdirectories. It should return the path suffix with theleftandrightprefix stripped. This is necessary becauseprocess_optswill add theleftandrightprefix back to the paths returned byread_dir_diff_paths. If we don't strip the prefix, we will end up with invalid paths where the prefix is duplicated.This went unnoticed since the current tests don't diff directories. I will add a test that diffs directories in a subsequent commit.