touch: shorten touch's docstring to make it fit into a one line
This make it show completely (untruncated) in `hg help -e evolve`.
This follows up on fed946edc293 where the docstring got unwrap for that
purpose and thus made the line length exceed 80 columns.
#require test-repo
$ checkcm() {
> if ! (which check-manifest > /dev/null); then
> echo skipped: missing tool: check-manifest;
> exit 80;
> fi;
> };
$ checkcm
$ cat << EOF >> $HGRCPATH
> [experimental]
> evolution=all
> EOF
Run check manifest:
$ cd $TESTDIR/..
$ check-manifest
lists of files in version control and sdist match