Merging a change that has already been merged yields a ' U .' notification,
but changes nothing. Changing nothing is correct; it should therefore issue no
notifications; it should say nothing.
Example:
[[[
% U=https://svn.apache.org/repos/asf/subversion
% svn diff --depth=empty -c r1497206 $U/branches/1.8.x
Index: .
===================================================================
--- . (revision 1497205)
+++ . (revision 1497206)
Property changes on: .
___________________________________________________________________
Modified: svn:mergeinfo
Merged /subversion/trunk:r1491432,1496938
% svn co -q $U/branches/1.8.x
% cd 1.8.x
% svn merge -c 1491432 $U/trunk ./
--- Recording mergeinfo for merge of r1491432 into '.':
U .
% svn diff
%
]]]
Expected behaviour: the merge command should have succeeded (exit code 0) with
no output.
Bug
Trivial