[LyX/master] Small improvement to 2ac48f2c.

[Kornel Benko]

commit 6a37a67b46506bf1402ace55c2016a659f0d2999
Author: Kornel Benko <kornel at lyx.org>
Date:   Tue Dec 15 12:54:04 2020 +0100

    Small improvement to 2ac48f2c.
    
    Making the regex little more robust.
---
 lib/scripts/prefs2prefs_prefs.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/scripts/prefs2prefs_prefs.py b/lib/scripts/prefs2prefs_prefs.py
index 61c93d0..d3a70d2 100644
--- a/lib/scripts/prefs2prefs_prefs.py
+++ b/lib/scripts/prefs2prefs_prefs.py
@@ -458,11 +458,11 @@ def rename_cyrillic_kmap_files(line):
 def add_dark_color(line):
 	if not line.lower().startswith("\\set_color "):
 		return no_match
-	colre = re.compile(r'^\\set_color\s+(.*)\s+(.*)"', re.IGNORECASE)
+	colre = re.compile(r'^\\set_color\s+("[^"]+")\s+("[^"]+")\s*$', re.IGNORECASE)
 	m = colre.match(line)
 	if not m:
 		return no_match
-	line += " " + m.group(2) + '"'
+	line += " " + m.group(2)
 	return (True, line)
 
 # End conversions for LyX 2.3 to 2.4