[OMCPathReal] fix flake8

OMPython/OMCSession.py:339:110: E999 SyntaxError: f-string: unmatched '('

Author: syntron

OMPython/OMCSession.py

@@ -335,7 +335,8 @@ def write_text(self, data: str, encoding=None, errors=None, newline=None):
         if not isinstance(data, str):
             raise TypeError(f"data must be str, not {data.__class__.__name__}")
 
-        self._session.sendExpression(f'writeFile("{self.as_posix()}", "{data.replace('"', '\\"')}", false);')
+        data_omc = data.replace('"', '\\"')
+        self._session.sendExpression(f'writeFile("{self.as_posix()}", "{data_omc}", false);')
 
         return len(data)