Renaming .tmp to .plot, rather than copying the .tmp to .plot

[codinghorror]

It’s my understanding that if the second temp and temp folder are the same folder, it does a rename.

@codinghorror

It’s worth mentioning that if you do this and your 2nd tmp dir is on the same drive where you want the final plot to be on, then you should set the 2nd tmp dir to the same dir where the final plot should be. This way you avoid copying the final tmp file to final dir after phase 4. Instead it will just get renamed, which is instant.