Trivial: little typos

[ghost]

I wish I could merge it with #8505

[jonasschnelli]

Trivial ACK b6190a7.
It's good to have only a few of these typo fix PRs and combine them as much as possible to not disturb other PRs.

[sipa]

Please don't change code inside the leveldb subtree directly. You could do so through the https://github.com/bitcoin/leveldb repository (which is sometimes synced with the src/leveldb directory), however.

[jonasschnelli]

Oh. Right. Change is on a subtree.
un-Trivial-ACK.

[ghost]

It's good to have only a few of these typo fix PRs and combine them as much as possible to not disturb other PRs.

Yes, 2 typos for a Pull Request isn't enough.

I'll close this Pull Request because...

Please don't change code inside the leveldb subtree directly. You could do
so through the https://github.com/bitcoin/leveldb repository (which is
sometimes synced with the src/leveldb directory), however.

...because I'll open A Pull Request in leveldb repo.