vs-code: Append a text to multiple opened files using regex?

Question

I'm trying to append some text to multiple files. Is this possible in VS-Code with Edit->"Replace in Files" using regex?

\z (only the end of text) is not working here - invalid regular expression.

I looked at https://docs.rs/regex/0.2.10/regex/#empty-matches because https://stackoverflow.com/questions/42179046/what-flavor-of-regex-does-visual-studio-code-use mentions that Rust regex is used in vs-code. — Jan Ptáčník, May 19 '20 at 09:29
wow! it works - could you please explain this regex for me? or add a link with explanation? — Jan Ptáčník, May 19 '20 at 09:33
VSC is run on Chrome V8 (Javascript) so unlikely it uses the Rust regex syntax — rioV8, May 20 '20 at 01:49

score 2 · Accepted Answer · answered May 19 '20 at 09:34

You may match the end of line that has no character immediately to the right:

$(?![\w\W])

Here, $ matches an end of line position and (?![\w\W]) is a negative lookahead that fails the match if any char appears immediately to the right of that location.

See the regex demo where m flag is enabled and makes $ match end of line positions, as in Visual Studio Code, and due to (?![\w\W]) it only matches at the very end of the text.

vs-code: Append a text to multiple opened files using regex?

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