fix ansi pager history santizer

[nerdrew]

fixes #1642

[nerdrew]

I can't tell if the logic for add_wrap_markers also needs to change.

[nerdrew]

The pager wrap still has ^M characters in it for me. The stdin = pipe_data['text'] change fixed it for me, though I'm not sure what deleting stdin = stdin.encode('utf-8') will break.

Here are screen shots of the various states for me. They all use the following invocation:

python3 . -o "map=f1 pipe @text_wrap overlay less -R -n" -o "scrollback_lines 50" -o "map=f2 pipe @ansi_wrap overlay less -R -n" -o "map=f3 pipe @text overlay less -R -n"

And this command to create the scrollback:

echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; for i in $(seq 0 100); echo $i

Regular show_scrollback (looks correct):

pipe @text_wrap overlay less -R -n (has spurious ^M characters and text is not wrapped, less does the wrapping):

pipe @ansi_wrap overlay less -R -n (color looks right, but again has spurious ^M characters and text is not wrapped, less does the wrapping):

pipe @text overlay less -R -n (looks right):

[kovidgoyal]

As noted here: https://sw.kovidgoyal.net/kitty/pipe.html

adding _wrap means that the output will have carriage returns in it. This is meant for programs that want to do wrapping themselves, typically when the screen they are writing to is of different size than the kitty window. If you want to pie to less in an overlay, dont use _wrap just use @ansi and you should be fine. There wil be no wrap markers causing less to do the wrapping itself, which should exactly match the kitty window, since the overlay window has the same size.

[nerdrew]

Ah! I missed that part of the documentation. That totally makes sense. Thanks for the awesome software!