Add custom function for title case to handle apostrophe

picard/track.py

@@ -321,6 +321,29 @@ def _customize_metadata(self):
 
     @staticmethod
     def _genres_to_metadata(genres, limit=None, minusage=0, filters='', join_with=None):
+        def titlize(text):
+            """Converts text to title case using custom rules.
+
+            Capitalizes the first character of each word while converting remaining
+            characters to lowercase. Handles contractions properly by keeping the
+            apostrophe intact.
+
+            Args:
+                text (str): The input string to be converted to title case.
+
+            Returns:
+                str: The input text converted to title case format.
+
+            Examples:
+                >>> titlize("children's music")
+                'Children's Music'
+                >>> titlize("blues")
+                "Blues"
+            """
+            return re.sub(r"[A-Za-z]+('[A-Za-z]+)?",
+                        lambda m: m.group(0)[0].upper() + m.group(0)[1:].lower(),
+                        text)
+
         if limit is not None and limit < 1:
             return []
 
@@ -335,7 +358,7 @@ def _genres_to_metadata(genres, limit=None, minusage=0, filters='', join_with=No
 
         # Find most common genres
         most_common_genres = genres.most_common(limit)
-        genres_list = [name.title() for name, _count in most_common_genres]
+        genres_list = [titlize(name) for name, _count in most_common_genres]
         genres_list.sort()
 
         # And generate the genre metadata tag