Makefiles punish you if instead of single tab somebody puts eight spaces in your makefile (happens when pasting between Makeiles). This script guards against this annoying pitfall. The following script auto-converts 8 spaces at the beginning of line (only in Makefiles, and only at the beginning of line) into tab, as you type or paste. It is suggested to have :set list in Makefiles, too. This script will only work if :set nopaste is set.