svn rm $URI mangles the commit-message-template

1.6 on ubuntu precise gets this right, 1.8 on trusty gets it wrong, the
following repro script is from trusty:

$ mkdir svnrmbug
$ cd svnrmbug
/home/eichin/tmp/svnrmbug
$ svnadmin create repo
$ U=file://$(pwd)/repo
$ svn mkdir --parents -m 'base' $U/{trunk,branches,tags,branches/me,tags/me}

Committed revision 1.
$ svn cp -m 'branch' $U/trunk $U/branches/me/bugbranch

Committed revision 2.
$ EDITOR=false VISUAL=false svn rm $U/branches/me/bugbranch
svn: E200012: system('false svn-commit.tmp') returned 256
svn: E200012: Your commit message was left in a temporary file:
svn: E200012: 'svn-commit.tmp'
$ cat svn-commit.tmp

--This line, and those below, will be ignored--

D file:///home/eichin/tmp/svnrmbug/repo/bugbranch

Note specifically the URI to be deleted. (Ironically, I think it really
*does* get ignored, a coworker pointed it out just recently and noone else
had seen it before...)

In a few experiments, it looks like the deletion line is consistently
(svnroot)/(basename branchpath) and that it doesn't happen with svn mkdir.
 Some quality time with trunk/CHANGES turned up only issue #1199 as being
even vaguely related (which mostly confirmed that it wasn't an intentional
change...)

-- 
_Mark_ <eichin_at_thok.org> <eichin_at_gmail.com>