Why do I have these underscores at the begining of the line after I pasted code from another editor, browswer

​ https://preview.redd.it/kxxjp1xikpz81.png?width=682&format=png&auto=webp&s=2d9b6a7ba064323fa436732f3f0a4021bb4e8088

Are they regular underscores? Try pasting them into a Unicode inspector

They just came up when I copied from draft buffer from gmail. If I copy from sent - it worked without these. ​ They are not regular underscores, as the code / config runs fine as above

Maybe these are indentation guides.

They are a kind of space, I forget which one. Put your cursor over them and say C-u C-x = to find out

`describe-char` with point at the character. No need for “Unicode inspector.”

If you start a pure, unconfigured Emacs via `emacs -Q`, and you paste the text into it ... do you still see these underscores? If not, than something in your configuration is the reason.