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

Various fixes to "diff --color-moved-ws". * pw/diff-color-moved-ws-fix: diff --color-moved: fix a memory leak diff --color-moved-ws: fix another memory leak diff --color-moved-ws: fix a memory leak diff --color-moved-ws: fix out of bounds string access diff --color-moved-ws: fix double free crash