record: use "ui.extractchoices()" to get the list of available responses

Before this patch, record extension gets the list of available
responses from online help document of "hg record" in the tricky way,
even though the value passed to "ui.promptchoice()" has enough (maybe
i18n-ed) information.

This patch uses "ui.extractchoices()" to get the list of available
responses.

hgext/record.py

@@ -7,7 +7,7 b''
 
 '''commands to interactively select changes for commit/qrefresh'''
 
-from mercurial.i18n import gettext, _
+from mercurial.i18n import _
 from mercurial import cmdutil, commands, extensions, hg, patch
 from mercurial import util
 import copy, cStringIO, errno, os, re, shutil, tempfile
@@ -286,21 +286,18 b' def filterpatch(ui, headers):'
             resps = _('[Ynesfdaq?]'
                       '$$ &Yes, record this change'
                       '$$ &No, skip this change'
-                      '$$ &Edit the change manually'
+                      '$$ &Edit this change manually'
                       '$$ &Skip remaining changes to this file'
                       '$$ Record remaining changes to this &file'
                       '$$ &Done, skip remaining changes and files'
                       '$$ Record &all changes to all remaining files'
                       '$$ &Quit, recording no changes'
-                      '$$ &?')
+                      '$$ &? (display help)')
             r = ui.promptchoice("%s %s" % (query, resps))
             ui.write("\n")
             if r == 8: # ?
-                doc = gettext(record.__doc__)
-                c = doc.find('::') + 2
-                for l in doc[c:].splitlines():
-                    if l.startswith('      '):
-                        ui.write(l.strip(), '\n')
+                for c, t in ui.extractchoices(resps)[1]:
+                    ui.write('%s - %s\n' % (c, t.lower()))
                 continue
             elif r == 0: # yes
                 ret = True

tests/test-record.t

@@ -673,15 +673,15 b' Help, quit'
   diff --git a/subdir/f1 b/subdir/f1
   1 hunks, 1 lines changed
   examine changes to 'subdir/f1'? [Ynesfdaq?] 
-  y - record this change
-  n - skip this change
+  y - yes, record this change
+  n - no, skip this change
   e - edit this change manually
   s - skip remaining changes to this file
   f - record remaining changes to this file
   d - done, skip remaining changes and files
   a - record all changes to all remaining files
   q - quit, recording no changes
-  ? - display help
+  ? - ? (display help)
   examine changes to 'subdir/f1'? [Ynesfdaq?] 
   abort: user quit
   [255]