Fix typos

Found via `codespell -S ./peeps,./pipenv/patched,./pipenv/vendor,./pipenv/pipenv.1,./get-pipenv.py,./tests/test_artifacts`

tests/integration/test_cli.py

@@ -228,7 +228,7 @@ def test_man(pipenv_instance_pypi):
 def test_install_parse_error(pipenv_instance_private_pypi):
     with pipenv_instance_private_pypi() as p:
 
-        # Make sure unparseable packages don't wind up in the pipfile
+        # Make sure unparsable packages don't wind up in the pipfile
         # Escape $ for shell input
         with open(p.pipfile_path, 'w') as f:
             contents = """

tests/integration/test_project.py

@@ -97,7 +97,7 @@ def test_maintain_file_line_endings(pipenv_instance_pypi, newlines):
             with open(fn, 'w', newline=newlines) as f:
                 f.write(contents)
 
-        # Run pipenv install to programatically rewrite
+        # Run pipenv install to programmatically rewrite
         c = p.pipenv('install chardet')
         assert c.returncode == 0
 

tests/unit/test_environments.py

@@ -29,7 +29,7 @@ def test_get_from_env(arg, prefix, use_negation):
             main_expected_value = True if is_positive else None
             if use_negation and not is_positive:
                 main_expected_value = False
-            # use negation means if the normal variable isnt set we will check
+            # use negation means if the normal variable isn't set we will check
             # for the negated version
             negative_expected_value = True if is_negative else None
             if is_positive: