style: spelling and grammar fixes

docs/config.rst

@@ -390,7 +390,7 @@ The session object
 
 .. module:: nox.sessions
 
-Nox will call your session functions with a an instance of the :class:`Session`
+Nox will call your session functions with an instance of the :class:`Session`
 class.
 
 .. autoclass:: Session

nox/sessions.py

@@ -93,7 +93,7 @@ def _dblquote_pkg_install_arg(pkg_req_str: str) -> str:
         # sanity check: we need an even number of double-quotes
         if pkg_req_str.count('"') % 2 != 0:
             raise ValueError(
-                f"ill-formated argument with odd number of quotes: {pkg_req_str}"
+                f"ill-formatted argument with odd number of quotes: {pkg_req_str}"
             )
 
         if "<" in pkg_req_str or ">" in pkg_req_str:

nox/virtualenv.py

@@ -44,7 +44,7 @@ def __init__(self, interpreter: str) -> None:
 
 
 class ProcessEnv:
-    """A environment with a 'bin' directory and a set of 'env' vars."""
+    """An environment with a 'bin' directory and a set of 'env' vars."""
 
     location: str
 

nox/workflow.py

@@ -50,7 +50,7 @@ def execute(
                 args.append(return_value)
             return_value = function_(*args, global_config=global_config)
 
-            # If we got a integer value as a result, abort task processing
+            # If we got an integer value as a result, abort task processing
             # and return it.
             if isinstance(return_value, int):
                 return return_value

tests/test__option_set.py

@@ -40,7 +40,7 @@ def test_namespace(self):
         namespace = optionset.namespace()
 
         assert hasattr(namespace, "option_a")
-        assert not hasattr(namespace, "non_existant_option")
+        assert not hasattr(namespace, "non_existent_option")
         assert namespace.option_a == "meep"
 
     def test_namespace_values(self):
@@ -56,11 +56,11 @@ def test_namespace_values(self):
 
         assert namespace.option_a == "moop"
 
-    def test_namespace_non_existant_options_with_values(self):
+    def test_namespace_non_existent_options_with_values(self):
         optionset = _option_set.OptionSet()
 
         with pytest.raises(KeyError):
-            optionset.namespace(non_existant_option="meep")
+            optionset.namespace(non_existent_option="meep")
 
     def test_parser_hidden_option(self):
         optionset = _option_set.OptionSet()

tests/test_virtualenv.py

@@ -148,7 +148,7 @@ def test_condaenv_create(make_conda):
     venv.create()
     assert not dir_.join("test.txt").check()
 
-    # Test running create on an existing environment with reuse_exising
+    # Test running create on an existing environment with reuse_existing
     # enabled, it should not be deleted.
     dir_.ensure("test.txt")
     assert dir_.join("test.txt").check()
@@ -346,7 +346,7 @@ def test_create(monkeypatch, make_one):
     venv.create()
     assert not dir_.join("test.txt").check()
 
-    # Test running create on an existing environment with reuse_exising
+    # Test running create on an existing environment with reuse_existing
     # enabled, it should not be deleted.
     dir_.ensure("test.txt")
     assert dir_.join("test.txt").check()