change empty bodies from "pass" to "..."

CONTRIBUTING.md says to prefer ... Not the most impactful change but fixing
these will allow us to lint for it in the future and get a consistent style.

stdlib/2/__builtin__.pyi

@@ -24,8 +24,8 @@ _T3 = TypeVar('_T3')
 _T4 = TypeVar('_T4')
 _TT = TypeVar('_TT', bound='type')
 
-class staticmethod: pass   # Special, only valid as a decorator.
-class classmethod: pass  # Special, only valid as a decorator.
+class staticmethod: ...   # Special, only valid as a decorator.
+class classmethod: ...  # Special, only valid as a decorator.
 
 class object:
     __doc__ = ...  # type: Optional[str]

stdlib/2/encodings/utf_8.pyi

@@ -9,6 +9,6 @@ class StreamWriter(codecs.StreamWriter):
 class StreamReader(codecs.StreamReader):
     pass
 
-def getregentry() -> codecs.CodecInfo: pass
-def encode(input: str, errors: str = ...) -> bytes: pass
-def decode(input: bytes, errors: str = ...) -> str: pass
+def getregentry() -> codecs.CodecInfo: ...
+def encode(input: str, errors: str = ...) -> bytes: ...
+def decode(input: bytes, errors: str = ...) -> str: ...

stdlib/2/spwd.pyi

@@ -11,5 +11,5 @@ class struct_spwd(object):
     sp_expire = ...  # type: int
     sp_flag = ...  # type: int
 
-def getspall() -> List[struct_spwd]: pass
-def getspnam() -> struct_spwd: pass
+def getspall() -> List[struct_spwd]: ...
+def getspnam() -> struct_spwd: ...

stdlib/2/types.pyi

@@ -127,7 +127,7 @@ class FrameType:
     f_restricted = ...  # type: bool
     f_trace = ...  # type: Callable[[], None]
 
-    def clear(self) -> None: pass
+    def clear(self) -> None: ...
 
 SliceType = slice
 class EllipsisType: ...

stdlib/2and3/asyncore.pyi

@@ -15,7 +15,7 @@ from errno import (EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL,
 _maptype = Dict[str, Any]
 
 
-class ExitNow(Exception): pass
+class ExitNow(Exception): ...
 
 def read(obj: Any) -> None: ...
 def write(obj: Any) -> None: ...

stdlib/3/builtins.pyi

@@ -26,8 +26,8 @@ _T3 = TypeVar('_T3')
 _T4 = TypeVar('_T4')
 _TT = TypeVar('_TT', bound='type')
 
-class staticmethod: pass   # Special, only valid as a decorator.
-class classmethod: pass  # Special, only valid as a decorator.
+class staticmethod: ...   # Special, only valid as a decorator.
+class classmethod: ...  # Special, only valid as a decorator.
 
 class object:
     __doc__ = ...  # type: Optional[str]

stdlib/3/encodings/utf_8.pyi

@@ -9,6 +9,6 @@ class StreamWriter(codecs.StreamWriter):
 class StreamReader(codecs.StreamReader):
     pass
 
-def getregentry() -> codecs.CodecInfo: pass
-def encode(input: str, errors: str = ...) -> bytes: pass
-def decode(input: bytes, errors: str = ...) -> str: pass
+def getregentry() -> codecs.CodecInfo: ...
+def encode(input: str, errors: str = ...) -> bytes: ...
+def decode(input: bytes, errors: str = ...) -> str: ...

stdlib/3/inspect.pyi

@@ -95,7 +95,7 @@ class Signature:
                       follow_wrapped: bool = True) -> 'Signature': ...
 
 # The name is the same as the enum's name in CPython
-class _ParameterKind: pass
+class _ParameterKind: ...
 
 class Parameter:
     def __init__(self,

stdlib/3/linecache.pyi

@@ -1,5 +1,5 @@
 from typing import Any
 
-def getline(filename: str, lineno: int, module_globals: Any=...) -> str: pass
-def clearcache() -> None: pass
-def getlines(filename: str, module_globals: Any=...) -> None: pass
+def getline(filename: str, lineno: int, module_globals: Any=...) -> str: ...
+def clearcache() -> None: ...
+def getlines(filename: str, module_globals: Any=...) -> None: ...

stdlib/3/queue.pyi

@@ -18,7 +18,7 @@ class Queue(Generic[_T]):
     def put_nowait(self, item: _T) -> None: ...
     def join(self) -> None: ...
     def qsize(self) -> int: ...
-    def task_done(self) -> None: pass
+    def task_done(self) -> None: ...
 
 class PriorityQueue(Queue): ...
 class LifoQueue(Queue): ...

stdlib/3/token.pyi

@@ -58,6 +58,6 @@ N_TOKENS = 0
 NT_OFFSET = 0
 tok_name = ...  # type: Dict[int, str]
 
-def ISTERMINAL(x: int) -> bool: pass
-def ISNONTERMINAL(x: int) -> bool: pass
-def ISEOF(x: int) -> bool: pass
+def ISTERMINAL(x: int) -> bool: ...
+def ISNONTERMINAL(x: int) -> bool: ...
+def ISEOF(x: int) -> bool: ...

stdlib/3/types.pyi

@@ -129,7 +129,7 @@ class FrameType:
     f_locals = ...  # type: Dict[str, Any]
     f_trace = ...  # type: Callable[[], None]
 
-    def clear(self) -> None: pass
+    def clear(self) -> None: ...
 
 class GetSetDescriptorType:
     __name__ = ...  # type: str

stdlib/3/typing.pyi

@@ -63,11 +63,11 @@ class SupportsFloat(metaclass=ABCMeta):
 
 class SupportsComplex(metaclass=ABCMeta):
     @abstractmethod
-    def __complex__(self) -> complex: pass
+    def __complex__(self) -> complex: ...
 
 class SupportsBytes(metaclass=ABCMeta):
     @abstractmethod
-    def __bytes__(self) -> bytes: pass
+    def __bytes__(self) -> bytes: ...
 
 class SupportsAbs(Generic[_T]):
     @abstractmethod
@@ -180,10 +180,10 @@ class Container(Generic[_T_co]):
 
 
 if sys.version_info >= (3, 6):
-    class Collection(Sized, Iterable[_T_co], Container[_T_co], Generic[_T_co]): pass
+    class Collection(Sized, Iterable[_T_co], Container[_T_co], Generic[_T_co]): ...
     _Collection = Collection
 else:
-    class _Collection(Sized, Iterable[_T_co], Container[_T_co], Generic[_T_co]): pass
+    class _Collection(Sized, Iterable[_T_co], Container[_T_co], Generic[_T_co]): ...
 
 class Sequence(_Collection[_T_co], Reversible[_T_co], Generic[_T_co]):
     @overload

third_party/2/requests/packages/urllib3/connection.pyi

@@ -48,4 +48,4 @@ class VerifiedHTTPSConnection(HTTPSConnection):
 
 UnverifiedHTTPSConnection = ...  # type: Any
 
-class ConnectionError(Exception): pass
+class ConnectionError(Exception): ...

third_party/2/requests/packages/urllib3/packages/ssl_match_hostname/__init__.pyi

@@ -1 +1 @@
-class CertificateError(ValueError): pass
+class CertificateError(ValueError): ...

third_party/3/lxml/etree.pyi

@@ -23,7 +23,7 @@ class ElementChildIterator(Iterator['_Element']):
 
 class _Element(Iterable['_Element']):
     def addprevious(self, element: '_Element') -> None:
-        pass
+        ...
 
     attrib = ...  # type: MutableMapping[str, str]
     text = ...  # type: AnyStr
@@ -32,7 +32,7 @@ class _Element(Iterable['_Element']):
     def __iter__(self) -> ElementChildIterator: ...
 
 class ElementBase(_Element):
-    pass
+    ...
 
 class _ElementTree:
     def write(self,
@@ -47,29 +47,29 @@ class _ElementTree:
               exclusive: bool = ...,
               with_comments: bool = ...,
               inclusive_ns_prefixes: ListAnyStr = ...) -> None:
-        pass
+        ...
 
 class _XSLTResultTree(SupportsBytes):
-    pass
+    ...
 
 class _XSLTQuotedStringParam:
-    pass
+    ...
 
 class XMLParser:
-    pass
+    ...
 
 class XMLSchema:
     def __init__(self,
                  etree: Union[_Element, _ElementTree] = ...,
                  file: Union[AnyStr, typing.IO] = ...) -> None:
-        pass
+        ...
 
     def assertValid(self,
                     etree: Union[_Element, _ElementTree]) -> None:
-        pass
+        ...
 
 class XSLTAccessControl:
-    pass
+    ...
 
 class XSLT:
     def __init__(self,
@@ -77,42 +77,42 @@ class XSLT:
                  extensions: Dict_Tuple2AnyStr_Any = ...,
                  regexp: bool = ...,
                  access_control: XSLTAccessControl = ...) -> None:
-        pass
+        ...
 
     def __call__(self,
                  _input: Union[_Element, _ElementTree],
                  profile_run: bool = ...,
                  **kwargs: Union[AnyStr, _XSLTQuotedStringParam]) -> _XSLTResultTree:
-        pass
+        ...
 
     @staticmethod
     def strparam(s: AnyStr) -> _XSLTQuotedStringParam:
-        pass
+        ...
 
 def Element(_tag: AnyStr,
             attrib: DictAnyStr = ...,
             nsmap: DictAnyStr = ...,
             **extra: AnyStr) -> _Element:
-    pass
+    ...
 
 def SubElement(_parent: _Element, _tag: AnyStr,
                attrib: DictAnyStr = ...,
                nsmap: DictAnyStr = ...,
                **extra: AnyStr) -> _Element:
-    pass
+    ...
 
 def ElementTree(element: _Element = ...,
                 file: Union[AnyStr, typing.IO] = ...,
                 parser: XMLParser = ...) -> _ElementTree:
-    pass
+    ...
 
 def ProcessingInstruction(target: AnyStr, text: AnyStr = ...) -> _Element:
-    pass
+    ...
 
 def parse(source: Union[AnyStr, typing.IO],
           parser: XMLParser = ...,
           base_url: AnyStr = ...) -> _ElementTree:
-    pass
+    ...
 
 
 def fromstring(text: AnyStr,
@@ -134,31 +134,31 @@ def tostring(element_or_tree: Union[_Element, _ElementTree],
 
 
 class _ErrorLog:
-    pass
+    ...
 
 
 class Error(Exception):
-    pass
+    ...
 
 class LxmlError(Error):
     def __init__(self, message: Any, error_log: _ErrorLog = ...) -> None: ...
     error_log = ...  # type: _ErrorLog
 
 class DocumentInvalid(LxmlError):
-    pass
+    ...
 
 class LxmlSyntaxError(LxmlError, SyntaxError):
-    pass
+    ...
 
 class ParseError(LxmlSyntaxError):
-    pass
+    ...
 
 class XMLSyntaxError(ParseError):
-    pass
+    ...
 
 
 class _Validator:
-    pass
+    ...
 
 class DTD(_Validator):
     def __init__(self,