[PATCH 1/1] docs: contain horizontal overflow in C API descriptions

[Rito Rhymes]

Some documentation pages contain long C API signatures that can exceed
the content width and cause page-wide horizontal scroll overflow.

Apply contained horizontal scrolling to C API description blocks and
keep their signature rows on one line. This preserves signature
formatting while preventing them from breaking page layout.

Signed-off-by: Rito Rhymes <rito@xxxxxxxxxxxxxx>
---
 Documentation/sphinx-static/custom.css | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/sphinx-static/custom.css b/Documentation/sphinx-static/custom.css
index db24f4344..18bf8813b 100644
--- a/Documentation/sphinx-static/custom.css
+++ b/Documentation/sphinx-static/custom.css
@@ -40,6 +40,13 @@ li { text-indent: 0em; }
 dl.function, dl.struct, dl.enum { margin-top: 2em; background-color: #ecf0f3; }
 /* indent lines 2+ of multi-line function prototypes */
 dl.function dt { margin-left: 10em; text-indent: -10em; }
+/*
+ * Preserve C API signatures on one line and apply contained horizontal
+ * scrolling to prevent them from exceeding their container width and
+ * breaking page layout.
+ */
+dl.c { overflow-x: auto; overflow-y: hidden; }
+dl.c > dt.sig.sig-object { white-space: nowrap; }
 dt.sig-object { font-size: larger; }
 div.kernelindent { margin-left: 2em; margin-right: 4em; }
 
-- 
2.51.0