Fix editor search/replace feedback when replacing markup

[chiizujin]

Brief overview of PR changes/additions

When using the search/replace function in the editor, the feedback message displays incorrectly if markup is involved.

Motivation for adding to Evennia

Bug fix.

Other info

Before

>:
----------Line Editor [topic test]--------------------------------------------
01| A line with |rred text|n in it.
----------[l:01 w:007 c:0031]------------(:h for help)------------------------

>:s \|r |b
Search-replaced \ ->  for lines 1-1.

In the above message, -> is displayed in red and for lines 1-1. is displayed in blue. The message also doesn't reflect what was changed since the markup has been replaced with ANSI codes.

>:
----------Line Editor [topic test]--------------------------------------------
01| A line with |bred text|n in it.
----------[l:01 w:007 c:0031]------------(:h for help)------------------------

After

>:
----------Line Editor [topic test]--------------------------------------------
01| A line with |rred text|n in it.
----------[l:01 w:007 c:0031]------------(:h for help)------------------------

>:s \|r |b
Search-replaced \|r -> |b for lines 1-1.

There are no colours in the message and it correctly reflects what the change was.

>:
----------Line Editor [topic test]--------------------------------------------
01| A line with |bred text|n in it.
----------[l:01 w:007 c:0031]------------(:h for help)------------------------

The other code path (line range specified):

>:s 1:1 \|b |r
Search-replaced \|b -> |r for line 1.

Correct, with no colours.

[Griatch]

Good catch and improvement!