MM-41909: Allow 1 char channel name (#19845)

* [ MM-41909 ] Allow 1 character channel names

Change minimal length to 1

* [ MM-41909 ] Fix localization string

* [ MM-41909 ] Modify condition to allow 1 char channel name

* [ MM-41909 ] fix formatting

* [MM-41909] Linting fix

* [MM-41909] Fix regex

* [MM-41909] Localization update

* [MM-41909] Attempt to fix test

Co-authored-by: Kevin Jiang <>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/slashcommands/command_channel_rename_test.go

@@ -28,7 +28,7 @@ func TestRenameProviderDoCommand(t *testing.T) {
 	// Table Test for basic cases. Blank text in response indicates success
 	for msg, expected := range map[string]string{
 		"":                                    "api.command_channel_rename.message.app_error",
-		"o":                                   "api.command_channel_rename.too_short.app_error",
+		"o":                                   "",
 		"joram":                               "",
 		"More than 22 chars but less than 64": "",
 		strings.Repeat("12345", 13):           "api.command_channel_rename.too_long.app_error",