Fixed multiple typos
Summary:
A few "a->an" and "an->a". "Shows, if the supplied default SOCKS5 proxy" -> "Shows if the supplied default SOCKS5 proxy". Change made on 3 occurrences. "without fully understanding the ramification of a command" -> "without fully understanding the ramifications of a command". Removed duplicate words such as "the the".
Backport of core PR10633
https://github.com/bitcoin/bitcoin/pull/10633/files
Test Plan:
make check ./test/functional/test_runner.py wallet_hd
Reviewers: #bitcoin_abc, deadalnix
Reviewed By: #bitcoin_abc, deadalnix
Differential Revision: https://reviews.bitcoinabc.org/D3125