tweak links

Author: pirate

src/libstd/lib.rs

@@ -97,12 +97,12 @@
 //! # Contributing changes to the documentation
 //!
 //! Check out the rust contribution guidelines [here](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).
-//! The source for this documentation can be found on [Github](https://github.com/rust-lang/rust/tree/master/src/libstd).
+//! The source for this documentation can be found on [Github](https://github.com/rust-lang).
 //! To contribute changes, make sure you read the guidelines first, then submit
 //! pull-requests for your suggested changes.
 //! 
 //! Contributions are appreciated! If you see a part of the docs that can be
-//! improved, submit a PR, or chat with us first on irc.mozilla.org #rust.
+//! improved, submit a PR, or chat with us first on irc.mozilla.org #rust-docs.
 //!
 //! # A Tour of The Rust Standard Library
 //!