expand on rls stuff

thanks @Xanewok!

Author: steveklabnik

posts/2018-12-20-Rust-1.31.1.md

@@ -27,7 +27,27 @@ This patch release fixes a build failure on on `powerpc-unknown-netbsd` by
 way of [an update to the `libc`
 crate](https://github.com/rust-lang/rust/pull/56562) used by the compiler.
 
-Additionally, the Rust Language Server was updated to fix two critical bugs:
+Additionally, the Rust Language Server was updated to fix two critical bugs.
+First, [hovering over the type with documentation above single-line
+attributes led to 100% CPU
+usage:](https://github.com/rust-lang/rls/pull/1170)
+
+```rust
+/// Some documentation
+#[derive(Debug)] // Multiple, single-line
+#[allow(missing_docs)] // atributes
+pub struct MyStruct { /* ... */ }
+```
+
+[Go to definition was fixed for std types](https://github.com/rust-lang/rls/pull/1171):
+Before, using the RLS on `HashMap`, for example, tried to open this file
+
+```text
+~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/libstd/collections/hash/map.rs
+```
+
+and now RLS goes to the correct location (for Rust 1.31, note the extra `src`):
 
-* <https://github.com/rust-lang/rls/issues/1171>
-* <https://github.com/rust-lang/rls/pull/1170>
+```text
+~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/collections/hash/map.rs
+```