to_datetime's utc is not documented to allow None (#762)

Author: twoertwein

pandas-stubs/core/tools/datetimes.pyi

@@ -43,7 +43,7 @@ def to_datetime(
     errors: IgnoreRaise = ...,
     dayfirst: bool = ...,
     yearfirst: bool = ...,
-    utc: bool | None = ...,
+    utc: bool = ...,
     format: str | None = ...,
     exact: bool = ...,
     unit: str | None = ...,
@@ -57,7 +57,7 @@ def to_datetime(
     errors: Literal["coerce"],
     dayfirst: bool = ...,
     yearfirst: bool = ...,
-    utc: bool | None = ...,
+    utc: bool = ...,
     format: str | None = ...,
     exact: bool = ...,
     unit: str | None = ...,
@@ -71,7 +71,7 @@ def to_datetime(
     errors: IgnoreRaiseCoerce = ...,
     dayfirst: bool = ...,
     yearfirst: bool = ...,
-    utc: bool | None = ...,
+    utc: bool = ...,
     format: str | None = ...,
     exact: bool = ...,
     unit: str | None = ...,
@@ -92,7 +92,7 @@ def to_datetime(
     errors: IgnoreRaiseCoerce = ...,
     dayfirst: bool = ...,
     yearfirst: bool = ...,
-    utc: bool | None = ...,
+    utc: bool = ...,
     format: str | None = ...,
     exact: bool = ...,
     unit: str | None = ...,

tests/test_pandas.py

@@ -34,7 +34,7 @@ def test_types_to_datetime() -> None:
 
     r2: pd.Series = pd.to_datetime(df, unit="s", origin="unix")
     r3: pd.Series = pd.to_datetime(
-        df, unit="ns", dayfirst=True, utc=None, format="%M:%D", exact=False
+        df, unit="ns", dayfirst=True, utc=False, format="%M:%D", exact=False
     )
     r4: pd.DatetimeIndex = pd.to_datetime(
         [1, 2], unit="D", origin=pd.Timestamp("01/01/2000")