codefix: Fix LSP MenuCallback invocation (E119, not enough args)

[liskin]

Where are the tests? Have you added tests? Have you updated the tests? Read the
comment above and the documentation referenced in it first. Write tests!
Seriously, read :help ale-dev and write tests.

Can the right-click menu be tested somehow? Dunno. :-(

[tmc]

Looking forward to this merging!

[stale]

This pull request has been automatically marked as stale because it has not been updated recently. Make sure to write tests and document your changes. See :help ale-dev for information on writing tests.
If your pull request is good to merge, bother w0rp or another maintainer again, and get them to merge it.

[liskin]

@w0rp @hsanson Any hints how to add a test for this?

[hsanson]

@liskin I have never encounter this error. Can you provide me instructions on how to trigger it so I can test the fix?

[liskin]

@hsanson

1. setup right click to open popup (probably default in gvim, needs set nocompatible mouse=a mousemodel=popup_setpos in console vim)
2. open file where some LSP is active (I tested with python and pyls)
3. right click
4. boom, there's a E119 error

[hsanson]

Indeed this PR fixes a bug in the call.