expand - convert tabs to spaces
expand [-t1,t2, ...] [file]
-t Tab stop positions
expand -16,32,48,64 # Expand stdin with tabs every 16 columns
Expand replaces tabs in the named files with the equivalent numbers of spaces. If no files are listed, stdin is given. If only one tab is given, the rest are multiples of it. The default is a tab every 8 spaces.