How to add a string to the end of each line in VS Code using regex?

Question

In Visual Studio Code I\'m using the replacement feature. The regex option is activated and the parameters are as follows.

Find: ^.*$
Replace: \\0 D

Answer 1

This patter does work on my VS Code but only on lines that actually contain something. Empty lines stay empty.

Find: ^(.*)$
Replace: $0 Donkey