Add note about using C-style vs C++-style comments
diff --git a/docs/development/submitting-patches.rst b/docs/development/submitting-patches.rst
index 3eea1dd..c05f56d 100644
--- a/docs/development/submitting-patches.rst
+++ b/docs/development/submitting-patches.rst
@@ -123,6 +123,13 @@
/* Bad */
long f(int,char *)
+Use C-style ``/* */`` comments instead of C++-style ``//``:
+
+.. code-block:: c
+
+ // Bad
+ /* Good */
+
Values set by ``#define`` should be assigned the appropriate type. If you see
this: