ensure that required version of typos is installed if spellcheck invoked

Author: klensy

src/tools/tidy/src/ext_tool_checks.rs

@@ -516,8 +516,19 @@ fn shellcheck_runner(args: &[&OsStr]) -> Result<(), Error> {
 
 /// Check that spellchecker is installed then run it at the given path
 fn spellcheck_runner(args: &[&str]) -> Result<(), Error> {
-    match Command::new("typos").arg("--version").status() {
-        Ok(_) => (),
+    // sync version with .github/workflows/spellcheck.yml
+    let expected_version = "typos-cli 1.34.0";
+    match Command::new("typos").arg("--version").output() {
+        Ok(o) => {
+            let stdout = String::from_utf8_lossy(&o.stdout);
+            if stdout.trim() != expected_version {
+                return Err(Error::Version {
+                    program: "typos",
+                    required: expected_version,
+                    installed: stdout.trim().to_string(),
+                });
+            }
+        }
         Err(e) if e.kind() == io::ErrorKind::NotFound => {
             return Err(Error::MissingReq(
                 "typos",