Rollup merge of rust-lang#60172 - varkor:tidy-double-trailing-newline, r=kennytm

Disallow double trailing newlines in tidy

This wasn't done previously in rust-lang#47064 (comment) as it affected too many files, but I think it's best to fix it now so that the number of files with double trailing newlines doesn't keep increasing.

r? kennytm

Author: kennytm

src/ci/docker/scripts/android-sdk.sh

@@ -26,4 +26,3 @@ abi="$(echo "${details}" | awk '{print($2)}')"
 echo no | avdmanager create avd \
     -n "$abi-$api" \
     -k "system-images;android-$api;default;$abi"
-

src/ci/docker/scripts/musl-toolchain.sh

@@ -71,4 +71,3 @@ cmake ../libunwind-release_$LLVM \
 hide_output make -j$(nproc)
 cp lib/libunwind.a $OUTPUT/$TARGET/lib
 cd - && rm -rf libunwind-build
-

src/liballoc/str.rs

@@ -573,4 +573,3 @@ impl str {
 pub unsafe fn from_boxed_utf8_unchecked(v: Box<[u8]>) -> Box<str> {
     Box::from_raw(Box::into_raw(v) as *mut str)
 }
-

src/libcore/iter/adapters/chain.rs

@@ -258,4 +258,3 @@ impl<A, B> FusedIterator for Chain<A, B>
 unsafe impl<A, B> TrustedLen for Chain<A, B>
     where A: TrustedLen, B: TrustedLen<Item=A::Item>,
 {}
-

src/libcore/iter/traits/exact_size.rs

@@ -140,4 +140,3 @@ impl<I: ExactSizeIterator + ?Sized> ExactSizeIterator for &mut I {
         (**self).is_empty()
     }
 }
-

src/libcore/num/flt2dec/decoder.rs

@@ -86,4 +86,3 @@ pub fn decode<T: DecodableFloat>(v: T) -> (/*negative?*/ bool, FullDecoded) {
     };
     (sign < 0, decoded)
 }
-

src/libcore/ops/unsize.rs

@@ -100,4 +100,3 @@ impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
 // *mut T -> *mut U
 #[unstable(feature = "dispatch_from_dyn", issue = "0")]
 impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
-

src/libcore/tests/num/bignum.rs

@@ -236,4 +236,3 @@ fn test_fmt() {
     assert_eq!(format!("{:?}", Big::from_u64(0x12345)), "0x1_23_45");
     assert_eq!(format!("{:?}", Big::from_u64(0x123456)), "0x12_34_56");
 }
-

src/libcore/tests/num/flt2dec/estimator.rs

@@ -47,4 +47,3 @@ fn test_estimate_scaling_factor() {
         assert_almost_eq!(estimate_scaling_factor(1, i as i16), expected as i16);
     }
 }
-

src/libcore/tests/num/flt2dec/mod.rs

@@ -1107,4 +1107,3 @@ pub fn to_exact_fixed_str_test<F>(mut f_: F)
                format!("0.0000000000000000000099999999999999994515327145420957165172950370\
                           2787392447107715776066783064379706047475337982177734375{:0>79881}", ""));
 }
-