Rollup of 8 pull requests#82663

Merged

bors merged 18 commits intorust-lang:masterfrom

jyn514:rollup-xh3cb0c

Mar 1, 2021

Commits on Feb 21, 2021

BTreeMap: correct tests for alternative choices of B
ssomers
committed

Commits on Feb 23, 2021

Update mdbook
ehuss
committed

Commits on Feb 24, 2021

Remove `ENABLE_DOWNLOAD_RUSTC` constant
jyn514
committed

Commits on Feb 27, 2021

Add missing diagnostic item Symbols
camsteffen
committed

Commits on Feb 28, 2021

Commits on Mar 1, 2021

config.toml error reporting:
osa1
committed
Add diagnostic items
camsteffen
committed
Use diagnostic items in into_iter_collections
camsteffen
committed
Rollup merge of #81210 - ssomers:btree_fix_node_size_test, r=Mark-Simulacrum
Joshua Nelson
authored
Rollup merge of #82360 - osa1:issue82317, r=Mark-Simulacrum
Joshua Nelson
authored
Rollup merge of #82428 - ehuss:update-mdbook, r=Mark-Simulacrum
Joshua Nelson
authored
Rollup merge of #82480 - jyn514:no-enable-constant, r=Mark-Simulacrum
Joshua Nelson
authored
Rollup merge of #82578 - camsteffen:diag-items, r=oli-obk
Joshua Nelson
authored
Rollup merge of #82620 - jyn514:apply-renamed-lints, r=Manishearth
Joshua Nelson
authored
Rollup merge of #82635 - pierwill:edit-infer, r=oli-obk
Joshua Nelson
authored
Rollup merge of #82645 - rkjnsn:patch-3, r=Mark-Simulacrum
Joshua Nelson
authored