doc: Clean up primitive short descriptions

This makes the primitive descriptions on the front page read properly
as descriptions of types and not of the associated modules.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libcollections/slice.rs b/src/libcollections/slice.rs
index f5a27565ef7..ae6cda793d0 100644
--- a/src/libcollections/slice.rs
+++ b/src/libcollections/slice.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Utilities for slice manipulation
+//! A dynamically-sized view into a contiguous sequence, `[T]`.
 //!
 //! The `slice` module contains useful code to help work with slice values.
 //! Slices are a view into a block of memory represented as a pointer and a
diff --git a/src/libcollections/str.rs b/src/libcollections/str.rs
index cb6613998b4..8ab1464379f 100644
--- a/src/libcollections/str.rs
+++ b/src/libcollections/str.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Unicode string manipulation (the `str` type).
+//! Unicode string slices
 //!
 //! Rust's `str` type is one of the core primitive types of the language. `&str`
 //! is the borrowed string type. This type of string can only be created from