'\' convert error in VSCode snippet

[sabertazimi]

In VSCode snippet, '' should convert to '\' in body field.

[pawelgrzybek]

This is a great suggestion. I will be honest with you — my RegEx skills sucks. If you don;t mind to submit PR I am more than happy to accept it. The way how it works is simple to understand and logic is abstracted per editor. There is a VSCode .js file that needs some changes in logic.