Merge branch 'rs/diff-no-index-cleanup'

"git diff --no-index A B" managed its the pathnames of its two input files rather haphazardly, sometimes leaking them. The command line argument processing has been straightened out to clean it up. * rs/diff-no-index-cleanup: diff-no-index: simplify argv index calculation diff-no-index: release prefixed filenames diff-no-index: release strbuf on queue error