commands: be more uniform in an "hg update" error message

"can only specify one of -C/--clean, -c/--check, or -m/merge"
becomes
"can only specify one of -C/--clean, -c/--check, or -m/--merge"

i18n/ja.po

@@ -16535,8 +16535,8 b' msgstr ""'
 msgid "for example: hg update \".::\""
 msgstr "指定例: hg update \".::\""
 
-msgid "can only specify one of -C/--clean, -c/--check, or -m/merge"
-msgstr "-C/--clean, -c/--check および -m/merge は複数指定できません"
+msgid "can only specify one of -C/--clean, -c/--check, or -m/--merge"
+msgstr "-C/--clean, -c/--check および -m/--merge は複数指定できません"
 
 msgid "verify the integrity of the repository"
 msgstr "リポジトリの整合性検証"

i18n/pt_BR.po

@@ -18293,9 +18293,9 b' msgstr ""'
 msgid "for example: hg update \".::\""
 msgstr "por exemplo: hg update \".::\""
 
-msgid "can only specify one of -C/--clean, -c/--check, or -m/merge"
-msgstr ""
-"só se pode especificar uma opção dentre -C/--clean, -c/--check ou -m/merge"
+msgid "can only specify one of -C/--clean, -c/--check, or -m/--merge"
+msgstr ""
+"só se pode especificar uma opção dentre -C/--clean, -c/--check ou -m/--merge"
 
 msgid "verify the integrity of the repository"
 msgstr "verifica a integridade do repositório"

mercurial/commands.py

@@ -5489,7 +5489,7 b' def update(ui, repo, node=None, rev=None'
 
     if len([x for x in (clean, check, merge) if x]) > 1:
         raise error.Abort(_("can only specify one of -C/--clean, -c/--check, "
-                            "or -m/merge"))
+                            "or -m/--merge"))
 
     updatecheck = None
     if check:

tests/test-update-branches.t

@@ -184,17 +184,17 b' Cases are run as shown in that table, ro'
   parent=2
 
   $ revtest '-cC dirty linear'  dirty 1 2 -cC
-  abort: can only specify one of -C/--clean, -c/--check, or -m/merge
+  abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
   parent=1
   M foo
 
   $ revtest '-mc dirty linear'  dirty 1 2 -mc
-  abort: can only specify one of -C/--clean, -c/--check, or -m/merge
+  abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
   parent=1
   M foo
 
   $ revtest '-mC dirty linear'  dirty 1 2 -mC
-  abort: can only specify one of -C/--clean, -c/--check, or -m/merge
+  abort: can only specify one of -C/--clean, -c/--check, or -m/--merge
   parent=1
   M foo