Merge branch 'cw/ws-indent-with-tab'

* cw/ws-indent-with-tab: whitespace: tests for git-apply --whitespace=fix with tab-in-indent whitespace: add tab-in-indent support for --whitespace=fix whitespace: replumb ws_fix_copy to take a strbuf *dst instead of char *dst whitespace: tests for git-diff --check with tab-in-indent error class whitespace: add tab-in-indent error class whitespace: we cannot "catch all errors known to git" anymore