Test fixes from the rollup

Closes #14482 (std: Bring back half of Add on String)
Closes #15026 (librustc: Remove the fallback to `int` from typechecking.)
Closes #15119 (Add more description to c_str::unwrap().)
Closes #15120 (Add tests for #12470 and #14285)
Closes #15122 (Remove the cheat sheet.)
Closes #15126 (rustc: Always include the morestack library)
Closes #15127 (Improve ambiguous pronoun.)
Closes #15130 (Fix #15129)
Closes #15131 (Add the Guide, add warning to tutorial.)
Closes #15134 (Xfailed tests for hygiene, etc.)
Closes #15135 (core: Add stability attributes to Clone)
Closes #15136 (Some minor improvements to core::bool)
Closes #15137 (std: Add stability attributes to primitive numeric modules)
Closes #15141 (Fix grammar in tutorial)
Closes #15143 (Remove few FIXMEs)
Closes #15145 (Avoid unnecessary temporary on assignments)
Closes #15147 (Small improvements for metaprogramming)
Closes #15153 (librustc: Check function argument patterns for legality of by-move)
Closes #15154 (test: Add a test for regions, traits, and variance.)
Closes #15159 (rustc: Don't register syntax crates twice)
Closes #13816 (Stabilize version output for rustc and rustdoc)

src/libstd/num/int_macros.rs

@@ -59,6 +59,8 @@ impl FromStrRadix for $T {
 /// # Examples
 ///
 /// ```
+/// #![allow(deprecated)]
+///
 /// std::int::to_str_bytes(123, 10, |v| {
 ///     assert!(v == "123".as_bytes());
 /// });

src/libstd/num/uint_macros.rs

@@ -60,6 +60,8 @@ impl FromStrRadix for $T {
 /// # Examples
 ///
 /// ```
+/// #![allow(deprecated)]
+///
 /// std::uint::to_str_bytes(123, 10, |v| {
 ///     assert!(v == "123".as_bytes());
 /// });

src/test/compile-fail/repeat_count.rs

@@ -14,9 +14,13 @@ fn main() {
     let n = 1;
     let a = [0, ..n]; //~ ERROR expected constant integer for repeat count but found variable
     let b = [0, ..()]; //~ ERROR expected positive integer for repeat count but found ()
+    //~^ ERROR: expected `uint` but found `()`
     let c = [0, ..true]; //~ ERROR expected positive integer for repeat count but found boolean
+    //~^ ERROR: expected `uint` but found `bool`
     let d = [0, ..0.5]; //~ ERROR expected positive integer for repeat count but found float
+    //~^ ERROR: expected `uint` but found `<generic float #0>`
     let e = [0, .."foo"]; //~ ERROR expected positive integer for repeat count but found string
+    //~^ ERROR: expected `uint` but found `&'static str`
     let f = [0, ..-4];
     //~^ ERROR expected positive integer for repeat count but found negative integer
 }

src/test/debuginfo/generic-function.rs

@@ -55,9 +55,9 @@ fn dup_tup<T0: Clone, T1: Clone>(t0: &T0, t1: &T1) -> ((T0, T1), (T1, T0)) {
 
 fn main() {
 
-    let _ = dup_tup(&1, &2.5);
-    let _ = dup_tup(&3.5, &4_u16);
-    let _ = dup_tup(&5, &Struct { a: 6, b: 7.5 });
+    let _ = dup_tup(&1i, &2.5f64);
+    let _ = dup_tup(&3.5f64, &4_u16);
+    let _ = dup_tup(&5i, &Struct { a: 6, b: 7.5 });
 }
 
 fn zzz() {()}

src/test/debuginfo/generic-functions-nested.rs

@@ -52,8 +52,8 @@ fn outer<TA: Clone>(a: TA) {
 }
 
 fn main() {
-    outer(-1);
-    outer(-2.5);
+    outer(-1i);
+    outer(-2.5f64);
 }
 
 fn zzz() {()}

src/test/run-pass/issue-15108.rs

@@ -8,6 +8,4 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// compile-flags:-O
-
 fn main() {}