Provide auto-coding of `end` keywords

[dklilley]

Is your feature request related to a problem? Please describe. When writing a function, loop, or an if-statement, the end keyword for the closing of the block should be automatically inserted, similar to in the MATLAB Editor.

Describe the solution you'd like The end keyword should be automatically inserted. For example:

1. Type if true

if true% <-- cursor is here

2. Press enter

if true
    % <-- cursor is here
end