fix a few small spelling issues

found via `pre-commit try-repo https://github.com/codespell-project/codespell --all-files`

src/flake8/checker.py

@@ -109,7 +109,7 @@ class Manager(object):
         # First we walk through all of our error cases:
         # - multiprocessing library is not present
         # - we're running on windows in which case we know we have significant
-        #   implemenation issues
+        #   implementation issues
         # - the user provided stdin and that's not something we can handle
         #   well
         # - we're processing a diff, which again does not work well with

src/flake8/defaults.py

@@ -35,7 +35,7 @@ NOQA_INLINE_REGEXP = re.compile(
     # We do not want to capture the ``: `` that follows ``noqa``
     # We do not care about the casing of ``noqa``
     # We want a comma-separated list of errors
-    # https://regex101.com/r/4XUuax/2 full explenation of the regex
+    # https://regex101.com/r/4XUuax/2 full explanation of the regex
     r"# noqa(?::[\s]?(?P<codes>([A-Z]+[0-9]+(?:[,\s]+)?)+))?",
     re.IGNORECASE,
 )

src/flake8/main/mercurial.py

@@ -21,7 +21,7 @@ def hook(ui, repo, **kwargs):
     around Hooks: https://www.mercurial-scm.org/wiki/Hook.
 
     We avoid using the ``ui`` attribute because it can cause issues with
-    the GPL license tha Mercurial is under. We don't import it, but we
+    the GPL license that Mercurial is under. We don't import it, but we
     avoid using it all the same.
     """
     from flake8.main import application

src/flake8/main/vcs.py

@@ -12,7 +12,7 @@ from flake8.main import mercurial
 # NOTE(sigmavirus24): In the future, we may allow for VCS hooks to be defined
 # as plugins, e.g., adding a flake8.vcs entry-point. In that case, this
 # dictionary should disappear, and this module might contain more code for
-# managing those bits (in conjuntion with flake8.plugins.manager).
+# managing those bits (in conjunction with flake8.plugins.manager).
 _INSTALLERS = {"git": git.install, "mercurial": mercurial.install}
 
 

src/flake8/options/config.py

@@ -30,7 +30,7 @@ class ConfigFileFinder(object):
         :param list extra_config_files:
             Extra configuration files specified by the user to read.
         :param str config_file:
-            Configuration file override to only read configuraiton from.
+            Configuration file override to only read configuration from.
         :param bool ignore_config_files:
             Determine whether to ignore configuration files or not.
         """

src/flake8/options/manager.py

@@ -132,7 +132,7 @@ class Option(object):
             Number of arguments to parse for this option.
         :param const:
             Constant value to store on a common destination. Usually used in
-            conjuntion with ``action="store_const"``.
+            conjunction with ``action="store_const"``.
         :param iterable choices:
             Possible values for the option.
         :param str help:

src/flake8/utils.py

@@ -79,7 +79,7 @@ def _tokenize_files_to_codes_mapping(value):
 
 def parse_files_to_codes_mapping(value_):  # noqa: C901
     # type: (Union[Sequence[str], str]) -> List[Tuple[str, List[str]]]
-    """Parse a files-to-codes maping.
+    """Parse a files-to-codes mapping.
 
     A files-to-codes mapping a sequence of values specified as
     `filenames list:codes list ...`.  Each of the lists may be separated by