reset mergestate after commit

tests/test-resolve

@@ -0,0 +1,27 b''
+#!/bin/sh
+
+# test that a commit clears the merge state.
+
+hg init repo
+cd repo
+
+echo foo > file
+hg commit -Am 'add file' -d '0 0'
+
+echo bar >> file
+hg commit -Am 'append bar' -d '0 0'
+
+echo % create a second head
+hg up -C 0
+echo baz >> file
+hg commit -Am 'append baz' -d '0 0'
+
+echo % failing merge
+HGMERGE=internal:fail hg merge
+
+echo resolved > file
+hg resolve -m file
+hg commit -m 'resolved' -d '0 0'
+
+echo % resolve -l, should be empty
+hg resolve -l

tests/test-resolve.out

@@ -0,0 +1,8 b''
+adding file
+% create a second head
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+created new head
+% failing merge
+0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+use 'hg resolve' to retry unresolved file merges
+% resolve -l, should be empty

mercurial/commands.py

@@ -645,6 +645,9 b' def commit(ui, repo, *pats, **opts):'
     elif ui.verbose:
         ui.write(_('committed changeset %d:%s\n') % (rev,short(node)))
 
+    ms = merge_.mergestate(repo)
+    ms.reset(node)
+
 def copy(ui, repo, *pats, **opts):
     """mark files as copied for the next commit