run black over stubs, add checking to travis

django-stubs-generated/db/models/functions/text.pyi

@@ -5,14 +5,8 @@ from django.db.models import Func, Transform
 from django.db.models.expressions import Combinable, Expression, Value
 from django.db.models.sql.compiler import SQLCompiler
 
-
 class BytesToCharFieldConversionMixin:
-    def convert_value(
-        self,
-        value: str,
-        expression: BytesToCharFieldConversionMixin,
-        connection: DatabaseWrapper,
-    ) -> str: ...
+    def convert_value(self, value: str, expression: BytesToCharFieldConversionMixin, connection: DatabaseWrapper) -> str: ...
 
 class Chr(Transform):
     contains_aggregate: bool
@@ -24,12 +18,7 @@ class Chr(Transform):
     lookup_name: str = ...
     def as_mysql(self, compiler: Any, connection: Any): ...
     def as_oracle(self, compiler: Any, connection: Any): ...
-    def as_sqlite(
-        self,
-        compiler: SQLCompiler,
-        connection: DatabaseWrapper,
-        **extra_context: Any
-    ) -> Tuple[str, List[int]]: ...
+    def as_sqlite(self, compiler: SQLCompiler, connection: DatabaseWrapper, **extra_context: Any) -> Tuple[str, List[int]]: ...
 
 class ConcatPair(Func):
     contains_aggregate: bool
@@ -38,9 +27,7 @@ class ConcatPair(Func):
     output_field: django.db.models.fields.CharField
     source_expressions: List[django.db.models.expressions.Combinable]
     function: str = ...
-    def as_sqlite(
-        self, compiler: SQLCompiler, connection: DatabaseWrapper
-    ) -> Tuple[str, List[str]]: ...
+    def as_sqlite(self, compiler: SQLCompiler, connection: DatabaseWrapper) -> Tuple[str, List[str]]: ...
     def as_mysql(self, compiler: Any, connection: Any): ...
     def coalesce(self) -> ConcatPair: ...
 
@@ -65,16 +52,9 @@ class Left(Func):
     source_expressions: List[django.db.models.expressions.Combinable]
     function: str = ...
     arity: int = ...
-    def __init__(
-        self, expression: str, length: Union[Value, int], **extra: Any
-    ) -> None: ...
+    def __init__(self, expression: str, length: Union[Value, int], **extra: Any) -> None: ...
     def get_substr(self) -> Substr: ...
-    def use_substr(
-        self,
-        compiler: SQLCompiler,
-        connection: DatabaseWrapper,
-        **extra_context: Any
-    ) -> Tuple[str, List[int]]: ...
+    def use_substr(self, compiler: SQLCompiler, connection: DatabaseWrapper, **extra_context: Any) -> Tuple[str, List[int]]: ...
     as_oracle: Any = ...
     as_sqlite: Any = ...
 
@@ -109,13 +89,7 @@ class LPad(BytesToCharFieldConversionMixin, Func):
     output_field: django.db.models.fields.CharField
     source_expressions: List[django.db.models.expressions.Combinable]
     function: str = ...
-    def __init__(
-        self,
-        expression: str,
-        length: Union[Length, int],
-        fill_text: Value = ...,
-        **extra: Any
-    ) -> None: ...
+    def __init__(self, expression: str, length: Union[Length, int], fill_text: Value = ..., **extra: Any) -> None: ...
 
 class LTrim(Transform):
     contains_aggregate: bool
@@ -136,15 +110,8 @@ class Ord(Transform):
     function: str = ...
     lookup_name: str = ...
     output_field: Any = ...
-    def as_mysql(
-        self, compiler: Any, connection: Any, **extra_context: Any
-    ): ...
-    def as_sqlite(
-        self,
-        compiler: SQLCompiler,
-        connection: DatabaseWrapper,
-        **extra_context: Any
-    ) -> Tuple[str, List[Any]]: ...
+    def as_mysql(self, compiler: Any, connection: Any, **extra_context: Any): ...
+    def as_sqlite(self, compiler: SQLCompiler, connection: DatabaseWrapper, **extra_context: Any) -> Tuple[str, List[Any]]: ...
 
 class Repeat(BytesToCharFieldConversionMixin, Func):
     contains_aggregate: bool
@@ -154,15 +121,8 @@ class Repeat(BytesToCharFieldConversionMixin, Func):
     output_field: django.db.models.fields.CharField
     source_expressions: List[django.db.models.expressions.Combinable]
     function: str = ...
-    def __init__(
-        self,
-        expression: Union[Value, str],
-        number: Union[Length, int],
-        **extra: Any
-    ) -> None: ...
-    def as_oracle(
-        self, compiler: Any, connection: Any, **extra_context: Any
-    ): ...
+    def __init__(self, expression: Union[Value, str], number: Union[Length, int], **extra: Any) -> None: ...
+    def as_oracle(self, compiler: Any, connection: Any, **extra_context: Any): ...
 
 class Replace(Func):
     contains_aggregate: bool
@@ -173,13 +133,7 @@ class Replace(Func):
     output_field: django.db.models.fields.CharField
     source_expressions: List[django.db.models.expressions.Combinable]
     function: str = ...
-    def __init__(
-        self,
-        expression: Combinable,
-        text: Value,
-        replacement: Value = ...,
-        **extra: Any
-    ) -> None: ...
+    def __init__(self, expression: Combinable, text: Value, replacement: Value = ..., **extra: Any) -> None: ...
 
 class Right(Left):
     contains_aggregate: bool
@@ -238,12 +192,8 @@ class Substr(Func):
         length: Optional[Union[Value, int]] = ...,
         **extra: Any
     ) -> None: ...
-    def as_sqlite(
-        self, compiler: SQLCompiler, connection: DatabaseWrapper
-    ) -> Tuple[str, List[Union[int, str]]]: ...
-    def as_oracle(
-        self, compiler: SQLCompiler, connection: DatabaseWrapper
-    ) -> Tuple[str, List[int]]: ...
+    def as_sqlite(self, compiler: SQLCompiler, connection: DatabaseWrapper) -> Tuple[str, List[Union[int, str]]]: ...
+    def as_oracle(self, compiler: SQLCompiler, connection: DatabaseWrapper) -> Tuple[str, List[int]]: ...
 
 class Trim(Transform):
     contains_aggregate: bool