Run ruff formatter on existing code

src/packaging/markers.py

@@ -71,7 +71,6 @@ def _normalize_extra_values(results: Any) -> Any:
 def _format_marker(
     marker: Union[List[str], MarkerAtom, str], first: Optional[bool] = True
 ) -> str:
-
     assert isinstance(marker, (list, tuple, str))
 
     # Sometimes we have a structure like [[...]] which is a single item list

src/packaging/specifiers.py

@@ -364,7 +364,6 @@ def _get_operator(self, op: str) -> CallableOperator:
         return operator_callable
 
     def _compare_compatible(self, prospective: Version, spec: str) -> bool:
-
         # Compatible releases have an equivalent combination of >= and ==. That
         # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
         # implement this in terms of the other specifiers instead of
@@ -385,7 +384,6 @@ def _compare_compatible(self, prospective: Version, spec: str) -> bool:
         )
 
     def _compare_equal(self, prospective: Version, spec: str) -> bool:
-
         # We need special logic to handle prefix matching
         if spec.endswith(".*"):
             # In the case of prefix matching we want to ignore local segment.
@@ -429,21 +427,18 @@ def _compare_not_equal(self, prospective: Version, spec: str) -> bool:
         return not self._compare_equal(prospective, spec)
 
     def _compare_less_than_equal(self, prospective: Version, spec: str) -> bool:
-
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
         # the prospective version.
         return Version(prospective.public) <= Version(spec)
 
     def _compare_greater_than_equal(self, prospective: Version, spec: str) -> bool:
-
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
         # the prospective version.
         return Version(prospective.public) >= Version(spec)
 
     def _compare_less_than(self, prospective: Version, spec_str: str) -> bool:
-
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
         spec = Version(spec_str)
@@ -468,7 +463,6 @@ def _compare_less_than(self, prospective: Version, spec_str: str) -> bool:
         return True
 
     def _compare_greater_than(self, prospective: Version, spec_str: str) -> bool:
-
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
         spec = Version(spec_str)

src/packaging/version.py

@@ -452,7 +452,6 @@ def micro(self) -> int:
 def _parse_letter_version(
     letter: Optional[str], number: Union[str, bytes, SupportsInt, None]
 ) -> Optional[Tuple[str, int]]:
-
     if letter:
         # We consider there to be an implicit 0 in a pre-release if there is
         # not a numeral associated with it.
@@ -508,7 +507,6 @@ def _cmpkey(
     dev: Optional[Tuple[str, int]],
     local: Optional[LocalType],
 ) -> CmpKey:
-
     # When we compare a release version, we want to compare it with all of the
     # trailing zeros removed. So we'll use a reverse the list, drop all the now
     # leading zeros until we come to something non zero, then take the rest