Auto merge of #60104 - Centril:rollup-7vmae1a, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #59915 (Implement event filtering for self-profiler.)
 - #59933 (Make clear that format padding doesn't work for Debug)
 - #60023 (implement specialized nth_back() for Bytes, Fuse and Enumerate)
 - #60032 (Remove unwanted z-index change)
 - #60041 (Simplify the returning of a Result a bit)
 - #60045 (Suggest appropriate path when calling associated item on bare types)
 - #60052 (Correct unused parameter diagnostic)
 - #60056 (Update rustfmt to 1.2.1)
 - #60060 (whitelist RTM x86 target cpu feature)
 - #60061 (Change suggestion of field when not in self context)
 - #60064 (Point at try `?` on errors affecting the err match arm of the desugared code)
 - #60078 (Use more realistic example for thread builder)
 - #60080 (Fix small errors in docs for `rchunks_exact` and `rchunks_exact_mut`.)
 - #60082 (Update miri)
 - #60097 (Use -mergefunc-use-aliases for any LLVM >= 8)
 - #60098 (libcore: deny `elided_lifetimes_in_paths`)

Failed merges:

r? @ghost

1 files changed, 4 insertions, 3 deletions

diff --git a/src/liballoc/fmt.rs b/src/liballoc/fmt.rs
index d2ba9b00191..68cbc366d7b 100644
--- a/src/liballoc/fmt.rs
+++ b/src/liballoc/fmt.rs
@@ -343,9 +343,10 @@
 //! * `^` - the argument is center-aligned in `width` columns
 //! * `>` - the argument is right-aligned in `width` columns
 //!
-//! Note that alignment may not be implemented by some types. A good way
-//! to ensure padding is applied is to format your input, then use this
-//! resulting string to pad your output.
+//! Note that alignment may not be implemented by some types. In particular, it
+//! is not generally implemented for the `Debug` trait.  A good way to ensure
+//! padding is applied is to format your input, then use this resulting string
+//! to pad your output.
 //!
 //! ## Sign/`#`/`0`
 //!