Auto indent after end keyword

[giovannism20]

Motivation

Closes #272

Implementation

I wrote something based on actual code and not too complex. Basically, I just verified the exact position and back to the place where the indentation was wrong, adjusted it, and then back to the final position.

Automated Tests

Added test case for formatting indentation.

[vinistock]

This is looking great!

[vinistock]

We need to add d as a completion character in the on type formatter provider configuration here.

Also, can we change the implementation to use node locating? I think it's going to be more robust. Something like this

# ...
        when "d"
          auto_indent_after_end_keyword
# ...

      def auto_indent_after_end_keyword
        # We need to look for the end in the current line, not the previous one
        current_line = @lines[@position[:line]]
        return unless current_line&.strip == "end"

        # Instead of relying on regexes, we can try to find a Statements node on top
        # of the triggered position
        target, _parent, _nesting = T.cast(
          @document.locate_node(@position, node_types: [YARP::StatementsNode]),
          [T.nilable(YARP::StatementsNode), T.nilable(YARP::Node), T::Array[String]],
        )
        return unless target

        # If there is a statements node, then we want to push every node inside body
        # two characters forward
        target.body.each do |node|
          add_edit_with_text(...)
        end

        move_cursor_to(@position[:line], @position[:character])
      end

[giovannism20]

Ok, I'll change it!

[giovannism20]

Should I close this pull request ?
@vinistock

[vinistock]

I double checked the implementation and made some fixes. With the updated code, the auto-indent works as intended.

Can you please apply the suggestions and rebase the PR? Then we can ship it

[vinistock]

Thank you very much for the contribution!