Add extension checker for nested min/max (#7550)

This adds a new checker (not active by default) which identifies usages
similar to ``min(<arg1>, min(<arg2>, <arg3>))`` and suggests using a
simplified form of ``min(<arg1>, <arg2>, <arg3>)``. Same goes for
``max`` usage.

The logic is as follows: it detects calls to either ``min`` or ``max``
functions, and whenever one of their arguments is that same function, it
emits the message.

Co-authored-by: Daniël van Noord <13665637+DanielNoord@users.noreply.github.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/doc/data/messages/n/nested-min-max/good.py b/doc/data/messages/n/nested-min-max/good.py
new file mode 100644
index 000000000..2d348b224
--- /dev/null
+++ b/doc/data/messages/n/nested-min-max/good.py
@@ -0,0 +1 @@
+print(min(1, 2, 3))