Fix typos, duplicate words, and awkward phrasing in docs and user-facing strings #587
Description
crates/client/flashblocks/src/error.rs: change error text fromdeposit receipt mismatch: deposit transaction must have a deposit receipttodeposit receipt mismatch: transaction must have a deposit receiptand update the corresponding test expectation.crates/client/cli/src/signer.rs: change doc comment and error text fromBoth sequencer key and sequencer key path...toBoth sequencer key and key path....