This set of commands will allow you to truncate source lines
 to a specified length and then remove all of the trailing
 tabs and spaces.  This is useful when sources have been read
 in from cards or transfered over from ACD.
 
 Let FILE.EXT be the name of the file you wish to have truncated.
 Do the following,
 
 RUN $SLP
 SLP>FILE.EXT/CM:nnn=FILE.EXT
 /
 SLP>^Z
 >
 
 Where, nnn is the column number you wish the truncation to begin
 at.  Note that SLP assumes that nnn is OCTAL unless followed by
 a decimal point and that SLP will round nnn up to the nearest
 tab stop, i.e. nnn =8*((nnn+7)/8).