Fix two minor typing issues

novelwriter/common.py

@@ -255,7 +255,7 @@ def formatFileFilter(extensions: list[str | tuple[str, str]]) -> str:
     result = []
     for ext in extensions:
         if isinstance(ext, str):
-            result.append(f"{trConst(nwLabels.FILE_FILTERS.get(ext))} ({ext})")
+            result.append(f"{trConst(nwLabels.FILE_FILTERS.get(ext, 'ERR'))} ({ext})")
         elif isinstance(ext, tuple) and len(ext) == 2:
             result.append(f"{ext[0]} ({ext[1]})")
     return ";;".join(result)

novelwriter/text/counting.py

@@ -120,7 +120,7 @@ def standardCounter(text: str) -> tuple[int, int, int]:
     return cCount, wCount, pCount
 
 
-def bodyTextCounter(text: str | list[str]) -> tuple[int, int, int]:
+def bodyTextCounter(text: str) -> tuple[int, int, int]:
     """A counter that counts body text words, characters, and characters
     without white spaces.
     """