Fix `clippy::doc_lazy_continuation` lints

[waywardmonkeys]

Rust 1.80 brought a new clippy lint that detected when itemized list entries didn't indent the lines after the first. Indent those lines to silence that warning.

[Ogeon]

Thanks for taking the time to correct them! I see that a couple of other issues have popped up as well... :grimacing:

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #402 will improve performances by 10.14%

_{Comparing waywardmonkeys:fix-clippy-doc-lazy-continuation-lints (08ea298) with master (8550250)}

Summary

⚡ 1 improvements ✅ 45 untouched benchmarks

Benchmarks breakdown

	Benchmark	master	waywardmonkeys:fix-clippy-doc-lazy-continuation-lints	Change
⚡	multiply_3x3	316.7 ns	287.5 ns	+10.14%

[Ogeon]

The initial clippy step passed, so I will bypass the rest and fix them separately. I need to think about that syn MSRV issue a bit.