Add small code sample to custom checker documentation (#6960)

Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/doc/development_guide/how_tos/custom_checkers.rst b/doc/development_guide/how_tos/custom_checkers.rst
index eff8cf543..82dc54799 100644
--- a/doc/development_guide/how_tos/custom_checkers.rst
+++ b/doc/development_guide/how_tos/custom_checkers.rst
@@ -113,7 +113,12 @@ It has the following format::
 * The ``option-symbol`` is a unique name for the option.
   This is used on the command line and in config files.
   The hyphen is replaced by an underscore when used in the checker,
-  similarly to how you would use  ``argparse.Namespace``.
+  similarly to how you would use  ``argparse.Namespace``:
+
+  .. code-block:: python
+
+    if not self.linter.config.ignore_ints:
+        ...
 
 Next we'll track when we enter and leave a function.