fix UserInputError being handled incorrectly.

[vivekashok1221]

UserInputError has been made part of the if-elif block.
This should fix issue #76.

Additionally, MissingRequiredArgument now shows a different message.
old:

now:

[gustavwilliam]

Thanks. Could you also capitalize the description, so it doesn’t start with a lowercase letter?

[uncomfyhalomacro]

@gustavwilliam you might want to look at this. @codephile1221 Thanks for noticing the bug

[uncomfyhalomacro]

So if there is a MissingRequiredArgument happens, this bug occurs? nice catch 💯

[Shivansh-007]

yeah

[vivekashok1221]

So if there is a MissingRequiredArgument happens, this bug occurs? nice catch 100

Actually, this bug occurs if any UserInputError happens (including MissingRequriedArgument).

I added special handling of MissingRequiredArgument just so that the message is different.

[Shivansh-007]

Thanks! Looks Good To Me!

In future we could do something like this:

def error_handler():
  if userinputerror:
    handle_user_input_error()
  elif checkserror:
   handle_checkst_error():
  ... others

def handle_user_input_error():
        """
        * MissingRequiredArgument
        * TooManyArguments
        * BadArgument
        * ArgumentParsingError
        """

def handle_checkst_error():
        """
        * BotMissingPermissions
        * BotMissingRole
        * NoPrivateMessage
        """

... etc.

[vivekashok1221]

Thanks. Could you also capitalize the description, so it doesn’t start with a lowercase letter?

Yeah, I thought of that. I think rather than capitalizing, formatting the parameter (language in this case) with backticks is more appropriate. So the description would be "language is a missing required argument which is missing."

Or, we could alter the entire sentence structure.

There are two ways this can be carried out.

1. Get the error in str and format the first word (This is assuming the first word will be the parameter)
2. I believe MissingRequriedArgument can provide you with the missing argument and we should construct a message accordingly.

Both are easy to implement.

[vivekashok1221]

This part will be removed anyway after issue #30. However, VS Code was bothering me and I changed it.

[vivekashok1221]

Rather than capitalising, I decided to format the missing argument with a single line code-block.
Feel free to suggest changes.

[Shivansh-007]

Yeah that looks better.

[gustavwilliam]

LGTM, thanks!

[Shivansh-007]

Can we merge this as it is a high priority feature?

[vivax3794]

LGTM

[gustavwilliam]

it is a high priority feature?

@Shivansh-007 Well, yeah, it's currently one of the most important features on gurkbot, but it's not per say a high priority feature. We have a label for that, and this one does not warrant it.