fix detecting textEdits not applying because .get('newText') was falsy

{'range': {'start': {'line': 1, 'character': 0}, 'end': {'line': 2, 'character': 0}}, 'newText': ''}

plugin/core/protocol.py

@@ -6285,4 +6285,4 @@ def to_lsp(self) -> Position:
 
 
 def is_text_edit(value: Any) -> TypeGuard[TextEdit]:
-    return isinstance(value, dict) and bool(value.get('range')) and bool(value.get('newText'))
+    return isinstance(value, dict) and 'range' in value and 'newText' in value