Fix typo in server.py

Author: pidefrem

language_tool_python/server.py

@@ -190,7 +190,9 @@ def _get_valid_spelling_file_path() -> str:
 
     def _register_spellings(self, spellings):
         spelling_file_path = self._get_valid_spelling_file_path()
-        with open(spelling_file_path, "a+", encoding='utf-8') as spellings_file:
+        with (
+            open(spelling_file_path, "a+", encoding='utf-8')
+        ) as spellings_file:
             spellings_file.write(
                 "\n" + "\n".join([word for word in spellings])
             )
@@ -201,7 +203,7 @@ def _unregister_spellings(self):
         spelling_file_path = self._get_valid_spelling_file_path()
         with (
             open(spelling_file_path, 'r+', encoding='utf-8')
-        ) as spellings_file::
+        ) as spellings_file:
             spellings_file.seek(0, os.SEEK_END)
             for _ in range(len(self._new_spellings)):
                 while spellings_file.read(1) != '\n':