typo
diff --git a/src/doc/rustc-dev-guide/src/building/bootstrapping/what-bootstrapping-does.md b/src/doc/rustc-dev-guide/src/building/bootstrapping/what-bootstrapping-does.md
index 1dd5402..ffcfe25 100644
--- a/src/doc/rustc-dev-guide/src/building/bootstrapping/what-bootstrapping-does.md
+++ b/src/doc/rustc-dev-guide/src/building/bootstrapping/what-bootstrapping-does.md
@@ -394,8 +394,8 @@
   this is `compiletest`. For unit tests and doc tests this is the `libtest`
   runner.
 
-Most test runner accept `--help`, which you can use to find out the options
-accepted by the runner.
+Most test runners accept `--help`,
+which you can use to find out the options accepted by the runner.
 
 ## Environment Variables