Re: Need help with narroely focused use case of Emacs

[Max Nikulin <manikulin@gmail.com>]

On 29/06/2024 11:48, tomas@tuxteam.de wrote:
>    Do M-x (hold Meta, most of the time your Alt key, then "x").
>    You get a command for a prompt. Enter "query-replace-regexp"

And to get help for this function

C-h f query-replace-regexp RET

To open user manual switch to the help buffer and press "i".

A side note since an answer to the asked question has been posted.

To manipulate with HTML it is better to write a script in some 
programming language, e.g. for python there are lxml etree and 
BeautifulSoup packages. This way it is easier to maintain valid document 
structure with paired opening and closing tags.

I have not tried Emacs lisp facilities for dealing with HTML.