Merge branch 'bw/test-fix-grep-gnuism'

Fix two places that were the only place in the test suite that gave "a\+"
to platform grep and expected it to mean one or more "a", which is a
blatant GNUism.

* bw/test-fix-grep-gnuism:
t9400: fix gnuism in grep

diff --cc t/t9400-git-cvsserver-server.sh
Simple merge