line length

Author: mark-i-m

src/compiler-src.md

@@ -140,7 +140,8 @@ These include:
   run a lot of tests on a lot of platforms.
 - [`src/doc`]: Various documentation, including submodules for a few books.
 - [`src/etc`]: Miscellaneous utilities.
-- [`src/tools/rustc-workspace-hack`], and others: Various workarounds to make cargo work with bootstrapping.
+- [`src/tools/rustc-workspace-hack`], and others: Various workarounds to make
+  cargo work with bootstrapping.
 - And more...
 
 [`src/ci`]: https://github.com/rust-lang/rust/tree/master/src/ci