Auto merge of #34852 - GuillaumeGomez:rollup, r=GuillaumeGomez

Rollup of 7 pull requests

- Successful merges: #33362, #34768, #34837, #34838, #34847, #34848, #34849
- Failed merges: #33951, #34850

3 files changed, 17 insertions, 14 deletions

diff --git a/src/libcore/hash/sip.rs b/src/libcore/hash/sip.rs
index c52c0b0730b..4a806a3c986 100644
--- a/src/libcore/hash/sip.rs
+++ b/src/libcore/hash/sip.rs
@@ -18,7 +18,7 @@ use ptr;
 /// An implementation of SipHash 1-3.
 ///
 /// See: https://131002.net/siphash/
-#[unstable(feature = "sip_hash_13", issue = "29754")]
+#[unstable(feature = "sip_hash_13", issue = "34767")]
 #[derive(Debug, Clone, Default)]
 pub struct SipHasher13 {
     hasher: Hasher<Sip13Rounds>,
@@ -27,7 +27,7 @@ pub struct SipHasher13 {
 /// An implementation of SipHash 2-4.
 ///
 /// See: https://131002.net/siphash/
-#[unstable(feature = "sip_hash_13", issue = "29754")]
+#[unstable(feature = "sip_hash_13", issue = "34767")]
 #[derive(Debug, Clone, Default)]
 pub struct SipHasher24 {
     hasher: Hasher<Sip24Rounds>,
@@ -154,14 +154,14 @@ impl SipHasher {
 impl SipHasher13 {
     /// Creates a new `SipHasher13` with the two initial keys set to 0.
     #[inline]
-    #[unstable(feature = "sip_hash_13", issue = "29754")]
+    #[unstable(feature = "sip_hash_13", issue = "34767")]
     pub fn new() -> SipHasher13 {
         SipHasher13::new_with_keys(0, 0)
     }
 
     /// Creates a `SipHasher13` that is keyed off the provided keys.
     #[inline]
-    #[unstable(feature = "sip_hash_13", issue = "29754")]
+    #[unstable(feature = "sip_hash_13", issue = "34767")]
     pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher13 {
         SipHasher13 {
             hasher: Hasher::new_with_keys(key0, key1)
@@ -172,14 +172,14 @@ impl SipHasher13 {
 impl SipHasher24 {
     /// Creates a new `SipHasher24` with the two initial keys set to 0.
     #[inline]
-    #[unstable(feature = "sip_hash_13", issue = "29754")]
+    #[unstable(feature = "sip_hash_13", issue = "34767")]
     pub fn new() -> SipHasher24 {
         SipHasher24::new_with_keys(0, 0)
     }
 
     /// Creates a `SipHasher24` that is keyed off the provided keys.
     #[inline]
-    #[unstable(feature = "sip_hash_13", issue = "29754")]
+    #[unstable(feature = "sip_hash_13", issue = "34767")]
     pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher24 {
         SipHasher24 {
             hasher: Hasher::new_with_keys(key0, key1)
@@ -232,7 +232,7 @@ impl super::Hasher for SipHasher {
     }
 }
 
-#[unstable(feature = "sip_hash_13", issue = "29754")]
+#[unstable(feature = "sip_hash_13", issue = "34767")]
 impl super::Hasher for SipHasher13 {
     #[inline]
     fn write(&mut self, msg: &[u8]) {
@@ -245,7 +245,7 @@ impl super::Hasher for SipHasher13 {
     }
 }
 
-#[unstable(feature = "sip_hash_13", issue = "29754")]
+#[unstable(feature = "sip_hash_13", issue = "34767")]
 impl super::Hasher for SipHasher24 {
     #[inline]
     fn write(&mut self, msg: &[u8]) {
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index e849369d647..0ad1f671f15 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -25,6 +25,8 @@
 //!
 //! # How to use the core library
 //!
+//! Please note that all of these details are currently not considered stable.
+//!
 // FIXME: Fill me in with more detail when the interface settles
 //! This library is built on the assumption of a few existing symbols:
 //!
@@ -34,11 +36,12 @@
 //!   These functions are often provided by the system libc, but can also be
 //!   provided by the [rlibc crate](https://crates.io/crates/rlibc).
 //!
-//! * `rust_begin_unwind` - This function takes three arguments, a
-//!   `fmt::Arguments`, a `&str`, and a `u32`. These three arguments dictate
-//!   the panic message, the file at which panic was invoked, and the line.
-//!   It is up to consumers of this core library to define this panic
-//!   function; it is only required to never return.
+//! * `rust_begin_panic` - This function takes three arguments, a
+//!   `fmt::Arguments`, a `&'static str`, and a `u32`. These three arguments
+//!   dictate the panic message, the file at which panic was invoked, and the
+//!   line. It is up to consumers of this core library to define this panic
+//!   function; it is only required to never return. This requires a `lang`
+//!   attribute named `panic_fmt`.
 
 // Since libcore defines many fundamental lang items, all tests live in a
 // separate crate, libcoretest, to avoid bizarre issues.
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index fcdbde0d19f..97648cc3469 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -2318,7 +2318,7 @@ impl usize {
 /// let num = 12.4_f32;
 /// let inf = f32::INFINITY;
 /// let zero = 0f32;
-/// let sub: f32 = 0.000000000000000000000000000000000000011754942;
+/// let sub: f32 = 1.1754942e-38;
 /// let nan = f32::NAN;
 ///
 /// assert_eq!(num.classify(), FpCategory::Normal);