docs: fix some typos and changelog entries (tendermint#3915)

Fixes some typos in the docs.

Fixes the classification of some changelog items re Features vs. Improvements

CHANGELOG.md

@@ -17,20 +17,20 @@ program](https://hackerone.com/tendermint).
 
 ### FEATURES:
 
+- [blockchain] [\#3561](https://github.com/tendermint/tendermint/issues/3561) Add early version of the new blockchain reactor, which is supposed to be more modular and testable compared to the old version. To try it, you'll have to change `version` in the config file, [here](https://github.com/tendermint/tendermint/blob/master/config/toml.go#L303) NOTE: It's not ready for a production yet. For further information, see [ADR-40](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-040-blockchain-reactor-refactor.md) & [ADR-43](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-043-blockchain-riri-org.md)
+- [mempool] [\#3826](https://github.com/tendermint/tendermint/issues/3826) Make `max_msg_bytes` configurable(@bluele)
 - [node] [\#3846](https://github.com/tendermint/tendermint/pull/3846) Allow replacing existing p2p.Reactor(s) using [`CustomReactors`
   option](https://godoc.org/github.com/tendermint/tendermint/node#CustomReactors).
   Warning: beware of accidental name clashes. Here is the list of existing
   reactors: MEMPOOL, BLOCKCHAIN, CONSENSUS, EVIDENCE, PEX.
-- [p2p] [\#3834](https://github.com/tendermint/tendermint/issues/3834) Do not write 'Couldn't connect to any seeds' error log if there are no seeds in config file
 - [rpc] [\#3818](https://github.com/tendermint/tendermint/issues/3818) Make `max_body_bytes` and `max_header_bytes` configurable(@bluele)
-- [mempool] [\#3826](https://github.com/tendermint/tendermint/issues/3826) Make `max_msg_bytes` configurable(@bluele)
-- [blockchain] [\#3561](https://github.com/tendermint/tendermint/issues/3561) Add early version of the new blockchain reactor, which is supposed to be more modular and testable compared to the old version. To try it, you'll have to change `version` in the config file, [here](https://github.com/tendermint/tendermint/blob/master/config/toml.go#L303) NOTE: It's not ready for a production yet. For further information, see [ADR-40](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-040-blockchain-reactor-refactor.md) & [ADR-43](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-043-blockchain-riri-org.md)
+- [rpc] [\#2252](https://github.com/tendermint/tendermint/issues/2252) Add `/broadcast_evidence` endpoint to submit double signing and other types of evidence
 
 ### IMPROVEMENTS:
 
 - [abci] [\#3809](https://github.com/tendermint/tendermint/issues/3809) Recover from application panics in `server/socket_server.go` to allow socket cleanup (@ruseinov)
-- [rpc] [\#2252](https://github.com/tendermint/tendermint/issues/2252) Add `/broadcast_evidence` endpoint to submit double signing and other types of evidence
 - [p2p] [\#3664](https://github.com/tendermint/tendermint/issues/3664) p2p/conn: reuse buffer when write/read from secret connection(@guagualvcha)
+- [p2p] [\#3834](https://github.com/tendermint/tendermint/issues/3834) Do not write 'Couldn't connect to any seeds' error log if there are no seeds in config file
 - [rpc] [\#3076](https://github.com/tendermint/tendermint/issues/3076) Improve transaction search performance
 
 ### BUG FIXES:

docs/spec/abci/apps.md

@@ -66,7 +66,7 @@ After `Commit`, CheckTx is run again on all transactions that remain in the
 node's local mempool after filtering those included in the block. To prevent the
 mempool from rechecking all transactions every time a block is committed, set
 the configuration option `mempool.recheck=false`. As of Tendermint v0.32.1,
-an additional `Type` parameter is made available to the CheckTx function that 
+an additional `Type` parameter is made available to the CheckTx function that
 indicates whether an incoming transaction is new (`CheckTxType_New`), or a
 recheck (`CheckTxType_Recheck`).
 
@@ -211,7 +211,7 @@ message PubKey {
 
 The `pub_key` currently supports only one type:
 
-- `type = "ed25519" and`data = <raw 32-byte public key>`
+- `type = "ed25519"` and `data = <raw 32-byte public key>`
 
 The `power` is the new voting power for the validator, with the
 following rules: