Improved the tags impl regex
Sort trait bounds.

Closes #6334
collections, unicode: Add support for NFC and NFKC
Be more consistent with "Hello, world!"
Correct RFC reference in time::Tm::rfc3339 docs

Fixes #16158
Change strptime::match_strs to use borrowed rather than owned strings

Also modernise a few constructs in match_strs().
Fix API docs css reversing elements that it shouldn't

remove unneeded `pre.rust a' selector

move transform into `.test-arrow`

fixes #16138
Use hello_world instead of the guessing_game
Move caret under the 'x' variabe
collections: Implement Eq for DList, RingBuf, TreeMap, TreeSet
collections: Implement Ord for DList, RingBuf, TreeMap, TreeSet
collections: Implement FromIterator/Extendable for BitvSet
Fix misspelled comments.
mk: Add missing colon
doc: Make sure all doc titles say 'Rust'. #12466
Fix alignment tests for ARM on Linux. #14848
Use cargo new.

Now that this feature exists, we should use it.

Fixes #16078
Add note about Cargo.lock
Add a split_at method to slice::ImmutableVector

This method is similar to the mut_split_at method of slice::MutableVector.
Fix manual regarding attribute placement.

Fixes #15494.