Auto merge of #31523 - steveklabnik:rollup, r=steveklabnik

- Successful merges: #31473, #31513, #31514, #31515, #31516, #31520
- Failed merges:

5 files changed, 22 insertions, 21 deletions

diff --git a/src/libcore/convert.rs b/src/libcore/convert.rs
index c207ad16595..b4ac020795c 100644
--- a/src/libcore/convert.rs
+++ b/src/libcore/convert.rs
@@ -19,7 +19,7 @@
 //!
 //! - Impl the `As*` traits for reference-to-reference conversions
 //! - Impl the `Into` trait when you want to consume the value in the conversion
-//! - The `From` trait is the most flexible, usefull for values _and_ references conversions
+//! - The `From` trait is the most flexible, useful for values _and_ references conversions
 //!
 //! As a library writer, you should prefer implementing `From<T>` rather than
 //! `Into<U>`, as `From` provides greater flexibility and offer the equivalent `Into`
diff --git a/src/libcore/num/dec2flt/mod.rs b/src/libcore/num/dec2flt/mod.rs
index c0690c24bbb..9e946dc65c2 100644
--- a/src/libcore/num/dec2flt/mod.rs
+++ b/src/libcore/num/dec2flt/mod.rs
@@ -149,6 +149,13 @@ from_str_float_impl!(f32);
 from_str_float_impl!(f64);
 
 /// An error which can be returned when parsing a float.
+///
+/// This error is used as the error type for the [`FromStr`] implementation
+/// for [`f32`] and [`f64`].
+///
+/// [`FromStr`]: ../str/trait.FromStr.html
+/// [`f32`]: ../primitive.f32.html
+/// [`f64`]: ../primitive.f64.html
 #[derive(Debug, Clone, PartialEq)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct ParseFloatError {
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 99a74cf09f5..9a9dfaa2679 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -2160,7 +2160,13 @@ impl usize {
         intrinsics::mul_with_overflow }
 }
 
-/// Used for representing the classification of floating point numbers
+/// A classification of floating point numbers.
+///
+/// This `enum` is used as the return type for [`f32::classify()`] and [`f64::classify()`]. See
+/// their documentation for more.
+///
+/// [`f32::classify()`]: ../primitive.f32.html#method.classify
+/// [`f64::classify()`]: ../primitive.f64.html#method.classify
 #[derive(Copy, Clone, PartialEq, Debug)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub enum FpCategory {
@@ -2387,6 +2393,11 @@ fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32)
 }
 
 /// An error which can be returned when parsing an integer.
+///
+/// This error is used as the error type for the `from_str_radix()` functions
+/// on the primitive integer types, such as [`i8::from_str_radix()`].
+///
+/// [`i8::from_str_radix()`]: ../std/primitive.i8.html#method.from_str_radix
 #[derive(Debug, Clone, PartialEq)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct ParseIntError { kind: IntErrorKind }
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index f19970546d7..fa169416a10 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -1740,7 +1740,7 @@ impl StrExt for str {
         let mut matcher = pat.into_searcher(self);
         if let Some((a, b)) = matcher.next_reject() {
             i = a;
-            j = b; // Rember earliest known match, correct it below if
+            j = b; // Remember earliest known match, correct it below if
                    // last match is different
         }
         if let Some((_, b)) = matcher.next_reject_back() {
diff --git a/src/libcore/tuple.rs b/src/libcore/tuple.rs
index 4127e182e1d..abaabfd129b 100644
--- a/src/libcore/tuple.rs
+++ b/src/libcore/tuple.rs
@@ -8,24 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! A finite heterogeneous sequence, `(T, U, ..)`
-//!
-//! To access a single element of a tuple one can use the `.0`
-//! field access syntax.
-//!
-//! Indexing starts from zero, so `.0` returns first value, `.1`
-//! returns second value, and so on. In general, a tuple with *N*
-//! elements has field accessors from 0 to *N* - 1.
-//!
-//! If every type inside a tuple implements one of the following
-//! traits, then a tuple itself also implements it.
-//!
-//! * `Clone`
-//! * `PartialEq`
-//! * `Eq`
-//! * `PartialOrd`
-//! * `Ord`
-//! * `Default`
+// See src/libstd/primitive_docs.rs for documentation.
 
 use clone::Clone;
 use cmp::*;