Make confusable character warning less jarring (#25069)

This commit assumes that the warning can be made more discreet
so as to make it less annoying for the people that do not actually
need the warning, without necessarily increasing the risk for those
that do need it.

This doesn't fix the underlying problem of the warning being shown
in certain cases that, say, a certain kind of whitespace character
like 0x1E could be absolutely justifiable from a technical
perspective.

---------

Co-authored-by: delvh <dev.lh@web.de>

options/locale/locale_en-US.ini

@@ -1150,10 +1150,10 @@ file_view_rendered = View Rendered
 file_view_raw = View Raw
 file_permalink = Permalink
 file_too_large = The file is too large to be shown.
-invisible_runes_header = `This file contains invisible Unicode characters!`
-invisible_runes_description = `This file contains invisible Unicode characters that may be processed differently from what appears below. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to reveal hidden characters.`
-ambiguous_runes_header = `This file contains ambiguous Unicode characters!`
-ambiguous_runes_description = `This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.`
+invisible_runes_header = `This file contains invisible Unicode characters`
+invisible_runes_description = `This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.`
+ambiguous_runes_header = `This file contains ambiguous Unicode characters`
+ambiguous_runes_description = `This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.`
 invisible_runes_line = `This line has invisible unicode characters`
 ambiguous_runes_line = `This line has ambiguous unicode characters`
 ambiguous_character = `%[1]c [U+%04[1]X] can be confused with %[2]c [U+%04[2]X]`

templates/repo/unicode_escape_prompt.tmpl

@@ -1,6 +1,6 @@
 {{if .EscapeStatus}}
 	{{if .EscapeStatus.HasInvisible}}
-		<div class="ui error message unicode-escape-prompt gt-text-left">
+		<div class="ui warning message unicode-escape-prompt gt-text-left">
 			<button class="close icon hide-panel button" data-panel-closest=".message">{{svg "octicon-x" 16 "close inside"}}</button>
 			<div class="header">
 				{{$.root.locale.Tr "repo.invisible_runes_header"}}