Fix parsing '&' with the "complicated" filename parser

comicapi/filenameparser.py

@@ -1237,8 +1237,11 @@ def join_title(lst: list[filenamelexer.Item]) -> str:
         if lst[i + 1].typ in [filenamelexer.ItemType.Operator, filenamelexer.ItemType.Symbol]:
             # exept if followed by a dollarsign
             if not (
-                lst[i].typ in [filenamelexer.ItemType.Number, filenamelexer.ItemType.IssueNumber]
-                and lst[i + 1].val == "$"
+                (
+                    lst[i].typ in [filenamelexer.ItemType.Number, filenamelexer.ItemType.IssueNumber]
+                    and lst[i + 1].val == "$"
+                )
+                or lst[i + 1].val == "&"
             ):
                 continue
 

testing/filenames.py

@@ -23,6 +23,21 @@ datadir = pathlib.Path(__file__).parent / "data"
 cbz_path = datadir / "Cory Doctorow's Futuristic Tales of the Here and Now #001 - Anda's Game (2007).cbz"
 
 names = [
+    (
+        "Drystan & Esyllt #3",
+        "Shortened word followed by a number eg No. 13, Mr. 13",
+        {
+            "issue": "3",
+            "series": "Drystan & Esyllt",
+            "title": "",
+            "volume": "",
+            "year": "",
+            "remainder": "",
+            "issue_count": "",
+            "alternate": "",
+        },
+        (False, False),
+    ),
     (
         "Michel Vaillant #5 Nr. 13 aan de start",
         "Shortened word followed by a number eg No. 13, Mr. 13",