#Bash, 14

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    printf %$#d $@

Input list given at the command line.

Not much to explain here.  Simply uses built-in [`printf`][1] facilities to do the necessary padding, based off the number of passed args.

[Ideone][2].


  [1]: http://www.unix.com/man-page/POSIX/1posix/printf/
  [2]: https://ideone.com/PBbSpE