Fix typos found by codespell

docs/userguide/development_mode.rst

@@ -17,7 +17,7 @@ without requiring a new installation.
 
 You can enter this "development mode" by performing an :doc:`editable installation
 <pip:topics/local-project-installs>` inside of a :term:`virtual environment`,
-using :doc:`pip's <pip:cli/pip_install>` ``-e/--editable`` flag, as shown bellow:
+using :doc:`pip's <pip:cli/pip_install>` ``-e/--editable`` flag, as shown below:
 
 .. code-block:: bash
 
@@ -93,7 +93,7 @@ expectations:
 Unfortunately these expectations are in conflict with each other.
 To solve this problem ``setuptools`` allows developers to choose a more
 *"strict"* mode for the editable installation. This can be done by passing
-a special *configuration setting* via :pypi:`pip`, as indicated bellow:
+a special *configuration setting* via :pypi:`pip`, as indicated below:
 
 .. code-block:: bash
 

launcher.c

@@ -204,7 +204,7 @@ int create_and_wait_for_subprocess(char* command) {
     ZeroMemory(&p_info, sizeof(p_info));
     ZeroMemory(&s_info, sizeof(s_info));
     s_info.cb = sizeof(STARTUPINFO);
-    // set-up control handler callback funciotn
+    // set-up control handler callback function
     SetConsoleCtrlHandler((PHANDLER_ROUTINE) control_handler, TRUE);
     if (!CreateProcessA(NULL, commandline, NULL, NULL, TRUE, 0, NULL, NULL, &s_info, &p_info)) {
         fprintf(stderr, "failed to create process.\n");

setuptools/tests/test_build_meta.py

@@ -44,7 +44,7 @@ def __init__(self, *args, **kwargs):
         self.pool = futures.ProcessPoolExecutor(max_workers=1)
 
     def __getattr__(self, name):
-        """Handles aribrary function invocations on the build backend."""
+        """Handles arbitrary function invocations on the build backend."""
 
         def method(*args, **kw):
             root = os.path.abspath(self.cwd)
@@ -79,7 +79,7 @@ def __init__(self, *args, **kwargs):
          self.backend_obj) = self.backend_name.partition(':')
 
     def __call__(self, name, *args, **kw):
-        """Handles aribrary function invocations on the build backend."""
+        """Handles arbitrary function invocations on the build backend."""
         os.chdir(self.cwd)
         os.environ.update(self.env)
         mod = importlib.import_module(self.backend_name)