Better version diff

When changes are made to code, and you move to approve them, a "diff" of the previous vs. new code/settings are shown.  Also, when you switch versions from the top right dropdown in a given setting/rule detail screen, this also shows a "diff".   This is NOT a real diff as most people are used to (e.g. using other version frameworks like svn, git, or CLI diff).  For code blocks, can you please make it show a true diff so that we can see exactly what was changed in the code block?