"Perf builds for each rolled up PR" table gets confused by pipe `|` characters in description

[Zalathar]

See rust-lang/rust#121859 (comment) for an example.

The bot tried to render the rolled-up perf builds in a table, but the line for rust-lang/rust#121784 abruptly cuts off mid-description, because the issue description contains pipe characters (||).

Presumably they aren't being escaped by the bot, so the GitHub table renderer treats them as cell boundaries instead of visible pipe characters.

[Zalathar]

I imagine some backslash-escaping for pipe characters is needed here:

rustc-perf/site/src/github.rs

Lines 65 to 83 in 9580e15

	let message = c
	.rollup_merge
	.message
	.split('\n')
	// Skip over "Rollup merge of ..." and an empty line
	.nth(2)
	.map(|m| {
	if m.len() <= 60 {
	m.to_string()
	} else {
	format!("{}…", m.split_at(59).0)
	}
	})
	.unwrap_or_else(|| format!("#{}", c.original_pr_number));
	writeln!(
	&mut string,
	"|#{pr}|{message}|{commit}|",
	pr = c.original_pr_number
	)

[Kobzol]

Ah, good point, we should probably escape Markdown there.

[Kobzol]

Do you want to try to fix this? :)