fix corner case

Author: tshepang

src/doc/rustc-dev-guide/ci/sembr/src/main.rs

@@ -22,6 +22,8 @@ struct Cli {
 static REGEX_IGNORE: LazyLock<Regex> =
     LazyLock::new(|| Regex::new(r"^\s*(\d\.|\-|\*)\s+").unwrap());
 static REGEX_IGNORE_END: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"(\.|\?|;|!)$").unwrap());
+static REGEX_IGNORE_LINK_TARGETS: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"^\[.+\]: ").unwrap());
 static REGEX_SPLIT: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"(\.|\?|;|!)\s+").unwrap());
 
 fn main() -> Result<()> {
@@ -94,6 +96,7 @@ fn ignore(line: &str, in_code_block: bool) -> bool {
         || line.starts_with('#')
         || line.trim().is_empty()
         || REGEX_IGNORE.is_match(line)
+        || REGEX_IGNORE_LINK_TARGETS.is_match(line)
 }
 
 fn comply(content: &str) -> String {
@@ -221,6 +224,15 @@ fn test_prettify_prefix_spaces() {
     assert_eq!(expected, lengthen_lines(original, 50));
 }
 
+#[test]
+fn test_prettify_ignore_link_targets() {
+    let original = "\
+[a target]: https://example.com
+[another target]: https://example.com
+";
+    assert_eq!(original, lengthen_lines(original, 100));
+}
+
 #[test]
 fn test_sembr_then_prettify() {
     let original = "\

src/doc/rustc-dev-guide/src/tests/ci.md

@@ -210,7 +210,8 @@ a single try build running on a single PR at any given time.
 
 Note that try builds are handled using the [new bors] implementation.
 
-[rustc-perf]: https://github.com/rust-lang/rustc-perf [new bors]: https://github.com/rust-lang/bors
+[rustc-perf]: https://github.com/rust-lang/rustc-perf
+[new bors]: https://github.com/rust-lang/bors
 
 ### Modifying CI jobs
 
@@ -476,7 +477,8 @@ To do this:
 [`jobs.yml`]: https://github.com/rust-lang/rust/blob/master/src/ci/github-actions/jobs.yml
 [`.github/workflows/ci.yml`]: https://github.com/rust-lang/rust/blob/master/.github/workflows/ci.yml
 [`src/ci/citool`]: https://github.com/rust-lang/rust/blob/master/src/ci/citool
-[bors]: https://github.com/bors [homu]: https://github.com/rust-lang/homu
+[bors]: https://github.com/bors
+[homu]: https://github.com/rust-lang/homu
 [merge queue]: https://bors.rust-lang.org/queue/rust
 [dist-x86_64-linux]: https://github.com/rust-lang/rust/blob/master/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
 [the GitHub Actions workflows page]: https://github.com/rust-lang/rust/actions