Merge branch 'wy/docs-typofixes'

Various typos, grammatical errors, and duplicated words in both
documentation and code comments have been corrected.

* wy/docs-typofixes:
  docs: fix typos and grammar

diff --cc Documentation/fetch-options.adoc
Simple merge

diff --cc odb.h
Simple merge

diff --cc t/t4203-mailmap.sh
Simple merge