Convert format_util_readmes to Rust test

.github/workflows/ci.yml

@@ -85,17 +85,13 @@ jobs:
           rm -f "$HOME"/.cargo/bin/rustfmt
           rustup install nightly
           rustup component add rustfmt --toolchain nightly
-          cargo install cargo-rdme    || true
 
       - name: Format
         run: ./scripts/format.sh && git diff --exit-code
 
       - name: Format example READMEs
         run: ./scripts/update_example_READMEs.sh && git diff --exit-code
 
-      - name: Format util READMEs
-        run: ./scripts/update_util_READMEs.sh && git diff --exit-code
-
       - name: Lint
         run: ./scripts/lint.sh
 
@@ -145,6 +141,7 @@ jobs:
           cargo install cargo-hack           || true
           cargo install cargo-license        || true
           cargo install cargo-msrv           || true
+          cargo install cargo-rdme           || true
           cargo install cargo-sort           || true
           cargo install cargo-supply-chain   || true
           cargo install cargo-udeps --locked || true

cargo-dylint/tests/ci.rs

@@ -11,7 +11,7 @@ use similar_asserts::SimpleDiff;
 use std::{
     env::{set_current_dir, set_var},
     ffi::OsStr,
-    fs::{read_to_string, write},
+    fs::{read_dir, read_to_string, write},
     io::{stderr, Write},
     path::{Component, Path, PathBuf},
     str::FromStr,
@@ -122,6 +122,21 @@ fn cargo_dylint_and_dylint_readmes_are_equal() {
     compare_lines(&cargo_dylint_readme, &dylint_readme);
 }
 
+#[test]
+fn format_util_readmes() {
+    preserves_cleanliness("format_util_readmes", false, || {
+        for entry in read_dir("utils").unwrap() {
+            let entry = entry.unwrap();
+            let path = entry.path();
+            Command::new("cargo")
+                .arg("rdme")
+                .current_dir(path)
+                .assert()
+                .success();
+        }
+    });
+}
+
 #[test]
 fn hack_feature_powerset_udeps() {
     Command::new("rustup")