How can I clean up misaligned columns in text?

Question

I have a C program that outputs two columns, utterly misaligned. The reason for the misalignment is lengths of words in the first column are very different.

I have an o

Answer 1

I just add missing in another answers options:

Emacs with M-x align-regexp, M-x align-string, etc. read more at http://www.emacswiki.org/emacs/AlignCommands

POSIX shell (possibly build-in) command printf:

while read f1 f2 f3 tail; do printf "%10s %5s | %s" $f1 $f3 $tail; done