[LyX/master] fix get_quoted_value

[Juergen Spitzmueller]

commit eb16ecf8b616e1c1a1eccc1fab7f252906ff7c23
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Thu Aug 15 08:04:48 2024 +0200

    fix get_quoted_value
    
    The previous version also stripped quotes that are part of the string
---
 lib/lyx2lyx/parser_tools.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/lyx2lyx/parser_tools.py b/lib/lyx2lyx/parser_tools.py
index 20e60b3a6a..148938cdb3 100644
--- a/lib/lyx2lyx/parser_tools.py
+++ b/lib/lyx2lyx/parser_tools.py
@@ -430,7 +430,14 @@ def get_quoted_value(lines, token, start=0, end=0, default="", delete=False):
     val = get_value(lines, token, start, end, "", delete)
     if not val:
         return default
-    return val.strip('"')
+    # remove only outer pair of quotes,
+    # hence do not use strip('"')
+    if val[:1] == '"':
+        val = val[1:]
+    if val[-1:] == '"':
+        val = val[:-1]
+    
+    return val
 
 
 bool_values = {"true": True, "1": True, "false": False, "0": False}