[PATCH v3 1/2] docs: allow long links to wrap per character to prevent page overflow

[Rito Rhymes]

Some documentation pages contain long link text without natural
break points, which can force page-wide horizontal scroll overflow
on small screens.

Use overflow-wrap: anywhere for anchor text in the docs stylesheet so
links can wrap per character as a fallback when normal word boundaries
are unavailable.

Examples:
  https://docs.kernel.org/6.15/firmware-guide/acpi/non-d0-probe.html
  https://docs.kernel.org/6.15/arch/x86/earlyprintk.html

Signed-off-by: Rito Rhymes <rito@xxxxxxxxxxxxxx>
Assisted-by: Codex:GPT-5.4
---
v3: add latest public versioned URL examples to the patchlog

 Documentation/sphinx-static/custom.css | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/sphinx-static/custom.css b/Documentation/sphinx-static/custom.css
index db24f4344..4ec617d40 100644
--- a/Documentation/sphinx-static/custom.css
+++ b/Documentation/sphinx-static/custom.css
@@ -149,6 +149,11 @@ div.language-selection ul li:hover {
     background: #dddddd;
 }
 
+/* Let long link text wrap instead of forcing overflow. */
+a {
+    overflow-wrap: anywhere;
+}
+
 /* Make xrefs more universally visible */
 a.reference, a.reference:hover {
     border-bottom: none;
-- 
2.51.0