tests/narrow-library.sh

convert: make hg sha1 regex consistently be a bytes

Differential Revision: https://phab.mercurial-scm.org/D2222

cat >> $HGRCPATH <<EOF
[extensions]
narrow=
[ui]
ssh=python "$TESTDIR/dummyssh"
[experimental]
bundle2-exp = True
changegroup3 = True
EOF