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.

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

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

src/libcore/ptr.rs

@@ -10,7 +10,7 @@
 
 // FIXME: talk about offset, copy_memory, copy_nonoverlapping_memory
 
-//! Operations on raw pointers, `*const T`, and `*mut T`.
+//! Raw, unsafe pointers, `*const T`, and `*mut T`
 //!
 //! Working with raw pointers in Rust is uncommon,
 //! typically limited to a few patterns.

src/libcore/tuple.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations on tuples
+//! A finite heterogeneous sequence, `(T, U, ..)`
 //!
 //! To access a single element of a tuple one can use the `.0`
 //! field access syntax.

src/librustc_unicode/char.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Character manipulation (`char` type, Unicode Scalar Value)
+//! A Unicode scalar value
 //!
 //! This module provides the `CharExt` trait, as well as its
 //! implementation for the primitive `char` type, in order to allow

src/libstd/array.rs

@@ -8,8 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! A fixed-size array is denoted `[T; N]` for the element type `T` and
-//! the compile time constant size `N`. The size must be zero or positive.
+//! A fixed-size array, denoted `[T; N]`, for the element type, `T`, and
+//! the non-negative compile time constant size, `N`.
 //!
 //! Arrays values are created either with an explicit expression that lists
 //! each element: `[x, y, z]` or a repeat expression: `[x; N]`. The repeat

src/libstd/num/f32.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for 32-bits floats (`f32` type)
+//! The 32-bit floating point type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![allow(missing_docs)]

src/libstd/num/f64.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for 64-bits floats (`f64` type)
+//! The 32-bit floating point type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![allow(missing_docs)]

src/libstd/num/i16.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 16-bits integers (`i16` type)
+//! The 16-bit signed integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "i16")]

src/libstd/num/i32.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 32-bits integers (`i32` type)
+//! The 32-bit signed integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "i32")]

src/libstd/num/i64.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 64-bits integers (`i64` type)
+//! The 64-bit signed integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "i64")]

src/libstd/num/i8.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for signed 8-bits integers (`i8` type)
+//! The 8-bit signed integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "i8")]

src/libstd/num/isize.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for pointer-sized signed integers (`isize` type)
+//! The pointer-sized signed integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "isize")]

src/libstd/num/u16.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 16-bits integers (`u16` type)
+//! The 16-bit unsigned integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "u16")]

src/libstd/num/u32.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 32-bits integers (`u32` type)
+//! The 32-bit unsigned integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "u32")]

src/libstd/num/u64.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 64-bits integer (`u64` type)
+//! The 64-bit unsigned integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "u64")]

src/libstd/num/u8.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for unsigned 8-bits integers (`u8` type)
+//! The 8-bit unsigned integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "u8")]

src/libstd/num/usize.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations and constants for pointer-sized unsigned integers (`usize` type)
+//! The pointer-sized unsigned integer type
 
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(primitive = "usize")]

src/libstd/tuple.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Operations on tuples
+//! A finite heterogeneous sequence, `(T, U, ..)`
 //!
 //! To access the _N_-th element of a tuple one can use `N` itself
 //! as a field of the tuple.