Adding block comments with the editor works only when you select whole lines only.

[dullin]

As discussed in #26 , the current block comment editor action will insert the block comment suffix and prefix at the exact beginning and end of the selection.

MATLAB block comments only work when the prefix and suffix are on their respective lines.
The would block comment need to move the selection to select the whole lines of the selection before applying the suffix and prefix.

@kornilova-l found the class SelfManagingCommenter that could possibly add the action needed.