tests/narrow-library.sh

formatting: drop a few extra double quotes in docstrings

These were made obvious by the reformatting in D9430.

Differential Revision: https://phab.mercurial-scm.org/D9432

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