- stdin was not forwarded in testrm1 and testrm2
- Forwarding content with EOL using command substitution (`foo`) does not work
correctly, the lines are joined together which breaks the prompt readline.
- EOFError is raised in ui.prompt() if the input is too short on Linux while
OSX treats it as an empty line.
This patch prevents MQ from creating an inconsistent subrepo state. If
the .hgsub file has been changed, and none of the subrepos have
uncommitted changes, creating or updating a patch (using qnew, qrefresh,
or qrecord) will update .hgsubstate accordingly.
If any subrepos _do_ have uncommitted changes, qnew/qrefresh/qrecord
will abort.
Thanks to pmezard for proposing this solution.
