Fix some language in messages, comments, and docstrings #12

Job	Run time
docs	1m 53s
pyright	41s
behave (ubuntu, 3.7, etcd)	9m 14s
isort	21s
unit (ubuntu)	39s
behave (ubuntu, 3.7, etcd3)	8m 54s
Test compatibility with the latest version of ydiff	28s
unit (windows)	1m 14s
behave (ubuntu, 3.7, consul)	8m 52s
unit (macos)	1m 7s
behave (ubuntu, 3.7, exhibitor)	8m 41s
behave (ubuntu, 3.7, kubernetes)	9m 40s
behave (ubuntu, 3.7, raft)	9m 47s
behave (ubuntu, 3.12, etcd)	11m 3s
behave (ubuntu, 3.12, etcd3)	15m 29s
behave (ubuntu, 3.12, consul)	12m 6s
behave (ubuntu, 3.12, exhibitor)	12m 10s
behave (ubuntu, 3.12, kubernetes)	16m 30s
behave (ubuntu, 3.12, raft)	15m 57s
behave (macos, 3.8, raft)	10m 24s
behave (macos, 3.9, etcd)	8m 50s
behave (macos, 3.11, etcd3)	9m 32s
Finalize coveralls.io	0s
Finalize Codacy	0s
	2h 53m 32s

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