Merge remote-tracking branch 'origin/main'

Author: furesoft

Source/Silverfly/Lexing/Matcher/StringMatcher.cs

@@ -146,7 +146,7 @@ private static void ParseUnicodeEscape(Lexer lexer, StringBuilder builder, int l
                 return;
             }
 
-            codePoint = codePoint * 16 + Convert.ToInt32(char.ToString(lexer.Peek()), 16);
+            codePoint = (codePoint * 16) + Convert.ToInt32(char.ToString(lexer.Peek()), 16);
 
             lexer.Advance();
         }