Colin Walters 3314140415 tests/commit-sign: Update a bit to more modern style
I was trying to debug this while working on another PR. Add `echo ok` lines and
also use `assert_file_has_content` more directly; there's no reason to use an
intermediate `grep` since if it fails it won't print the original file.

Closes: #1220
Approved by: jlebon
2017-09-27 19:04:11 +00:00
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