Having <s> in docs causes the rest of the page to be struck-through

Code

Original code can be found here: https://github.com/Thomasdezeeuw/heph/blob/5b8f38814162abb1bf344ec659c449f99e79f2f7/rt/src/scheduler/mod.rs#L218 (used for the screenshot below).

A minimal case would be:

struct T {
    /// <S>
    field: (),
}

Reproduction Steps

• cargo doc
• Open the relevant documentation page (or use --open).

Expected Outcome

The documentation/dom elements outside of the documentation of the field not to be stroked-through.

Actual Output

Rustdoc throws a warning indicating the error, but the end result is still somewhat unexpected.

warning: unclosed HTML tag `S`
   --> rt/src/scheduler/mod.rs:203:9
    |
203 |     /// <S>
    |         ^^^
    |
    = note: `#[warn(rustdoc::invalid_html_tags)]` on by default

Version

rustdoc 1.98.0-nightly (ce9954c0c 2026-06-26)

Additional Details

I think this a low priority issue, not solving this perfectly fine in my opinion.

Start by reproducing the issue with cargo doc using the minimal Rust example and inspect the generated documentation page. Trace rustdoc's handling of the unclosed HTML tag, then add a regression test and verify that text after is no longer struck through while the warning behavior remains covered.