Fix ignoring whitespace

[vmarkovtsev]

Current behavior: we calculate diffs with removed whitespace. It is wrong because the new and deleted files are counted with whitespace characters.

hercules/internal/plumbing/diff.go

Line 139 in a4d2b46

src, dst, _ := dmp.DiffLinesToRunes(stripWhitespace(strFrom, diff.WhitespaceIgnore), stripWhitespace(strTo, diff.WhitespaceIgnore))

Desired behavior: change BlobCache to remove whitespace at blob loading time.