Merge branch 'pw/diff-color-moved-ws-fix'

"git diff --color-moved-ws" updates. * pw/diff-color-moved-ws-fix: diff --color-moved-ws: handle blank lines diff --color-moved-ws: modify allow-indentation-change diff --color-moved-ws: optimize allow-indentation-change diff --color-moved=zebra: be stricter with color alternation diff --color-moved-ws: fix false positives diff --color-moved-ws: demonstrate false positives diff: allow --no-color-moved-ws Use "whitespace" consistently diff: document --no-color-moved