Fixed quoting for Python < 3.12 [skip ci]

Author: ankane

pgvector/halfvec.py

@@ -47,7 +47,7 @@ def to_numpy(self) -> np.ndarray[tuple[int], np.dtype[np.float16]]:
         return np.frombuffer(self._value, dtype='>f2', count=self.dimensions(), offset=4)
 
     def to_text(self) -> str:
-        return f'[{','.join([str(v) for v in self.to_list()])}]'
+        return f'[{",".join([str(v) for v in self.to_list()])}]'
 
     def to_binary(self) -> bytes:
         return self._value

pgvector/vector.py

@@ -47,7 +47,7 @@ def to_numpy(self) -> np.ndarray[tuple[int], np.dtype[np.float32]]:
         return np.frombuffer(self._value, dtype='>f4', count=self.dimensions(), offset=4)
 
     def to_text(self) -> str:
-        return f'[{','.join([str(v) for v in self.to_list()])}]'
+        return f'[{",".join([str(v) for v in self.to_list()])}]'
 
     def to_binary(self) -> bytes:
         return self._value