Fix /correct quotation marks usage

Add new `parse_args_as_one()` function to just use everything after the
command as the argument.

Fix https://github.com/profanity-im/profanity/issues/1404

src/command/cmd_defs.c

@@ -2443,7 +2443,7 @@ static struct cmd_t command_defs[] = {
     },
 
     { "/correct",
-      parse_args_with_freetext, 1, 1, NULL,
+      parse_args_as_one, 1, 1, NULL,
       CMD_NOSUBFUNCS
       CMD_MAINFUNC(cmd_correct)
       CMD_TAGS(