diff -r bef8b17443a3 -r d6caadff4779 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Sun Apr 12 14:24:28 2015 -0400
+++ b/mercurial/localrepo.py	Sun Apr 12 14:26:11 2015 -0400
@@ -926,7 +926,7 @@
                 or self.ui.configbool('devel', 'check-locks')):
             l = self._lockref and self._lockref()
             if l is None or not l.held:
-                scmutil.develwarn(self.ui, 'transaction with no lock\n')
+                scmutil.develwarn(self.ui, 'transaction with no lock')
         tr = self.currenttransaction()
         if tr is not None:
             return tr.nest()
@@ -1216,7 +1216,7 @@
                 or self.ui.configbool('devel', 'check-locks')):
             l = self._lockref and self._lockref()
             if l is not None and l.held:
-                scmutil.develwarn(self.ui, '"wlock" acquired after "lock"\n')
+                scmutil.develwarn(self.ui, '"wlock" acquired after "lock"')
 
         def unlock():
             if self.dirstate.pendingparentchange():