xep-0308: Make /correct work without quotation marks

Now we can specify an unlimited amount of arguments for commands.
Maybe this is also helpful for other commands that use quotation marks
so far.

src/command/cmd_defs.c

@@ -2382,7 +2382,7 @@ static struct cmd_t command_defs[] =
     },
 
     { "/correct",
-        parse_args, 1, 1, NULL,
+        parse_args, 1, -1, NULL,
         CMD_NOSUBFUNCS
         CMD_MAINFUNC(cmd_correct)
         CMD_TAGS(
@@ -2393,10 +2393,8 @@ static struct cmd_t command_defs[] =
         CMD_DESC(
             "Correct and resend the last message (XEP-0308).")
         CMD_ARGS(
-            { "\"message\"",    "The corrected message. Multiple words need quotation marks."})
-        CMD_EXAMPLES(
-            "/correct Profanity",
-            "/correct \"Profanity is the best\"")
+            { "message",    "The corrected message."})
+        CMD_NOEXAMPLES
     },
 };