Merge branch 'mr/doc-negative-pathspec' into maint

Doc updates.

* mr/doc-negative-pathspec:
docs: improve discoverability of exclude pathspec

diff --cc Documentation/git-add.txt
Simple merge

diff --cc Documentation/git-grep.txt
Simple merge

diff --cc Documentation/git-status.txt
Simple merge

diff --cc Documentation/glossary-content.txt
Simple merge