EDIT: Solved
Let's say I want to replace all the occurrences of dash+digit, without a space, with dash
space digit.
I can use a regex to find what I look for (a very simple one:
-[:alpha:], for example), but I don't know how to automatically insert a space. The issue of course is somehow "saving" that digit each time, "copying" it, and pasting it after inserting the space.
I got a vague notion this could be done with javascript, but is there a simpler way?
ty
EDIT: Issue had already been solved,
here. If I put the regex between (brackets) it saves the value it finds, which then I can paste by writing
\1 in the "replace" field. So cool

And it works outside sigil as well (I just tried it w n++)