s/プログラムの心理/プログラムの真理/ (program truth)
Merge pull request #12 from nna774/fix_typo

s/プログラムの心理/プログラムの真理/ (program truth)
improved vertical centering of some math blocks

by making them part of their paragraph (removing blank lines before and after).
s/プログラムの心理/プログラムの真理/ (program truth)
s/プログラムの心理/プログラムの真理/ (program truth)
Applyed patches from Raba-san and Nona-san. Thanks!