record: add default value for operation argument

This patch is part of a series of patches to change the recording ui to reflect
the operation currently running (commit, shelve, revert ...).
This patch adds the default value of the operation argument for record's
standard and curses interface to match what is displayed in the interface
as of today.

mercurial/crecord.py

@@ -428,6 +428,8 b' class uihunk(patchnode):'
 def filterpatch(ui, chunks, chunkselector, operation=None):
     """interactively filter patch chunks into applied-only chunks"""
 
+    if operation is None:
+        operation = _('confirm')
     chunks = list(chunks)
     # convert chunks list into structure suitable for displaying/modifying
     # with curses.  create a list of headers only.

mercurial/patch.py

@@ -950,6 +950,8 b' class recordhunk(object):'
 
 def filterpatch(ui, headers, operation=None):
     """Interactively filter patch chunks into applied-only chunks"""
+    if operation is None:
+        operation = _('record')
 
     def prompt(skipfile, skipall, query, chunk):
         """prompt query, and process base inputs