[PATCH v2 1/4] t3701: redefine what is "bogus" output of a diff filter

From: Johannes Schindelin <johannes.schindelin@gmx.de>

When parsing the colored version of a diff, the interactive `add` command really relies on the colored version having the same number of lines as the non-colored version. That is an invariant.

However, in the 'detect bogus diffFilter output' test case in t3701, we essentially required a hunk header that contains parseable `@@ ... @@` hunk headers, and called all colored diffs without such hunks bogus.

The reason for this is that we would like to show the users the adjusted hunk headers _including_ the extra part after the `@@ ... @@` information, which usually contains things like the function name or soms such.

Now, there is a _very_ popular diff colorizer called `diff-so-fancy` that does not produce such colored diffs as the built-in `add` command expects. Nevertheless, the Perl variant of the `add` command handles those nicely, essentially by ignoring the hunk header and saying "there is nothing else we can show except the original hunk header, even if we had to adjust the line range and the original hunk header might get that wrong".

In preparation for teaching the built-in interactive `add` to be a bit more lenient, let's change the 'detect bogus diffFilter output' test case so that it verifies that a mismatched number of lines causes the command to error out, but not an unparseable hunk header.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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 t/t3701-add-interactive.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)