Absolutely trivial, but none the less ...
--- tetris-orig/shapes.c 2014-08-03 14:12:09.000000000 +0100 +++ tetris/shapes.c 2014-08-03 14:12:26.000000000 +0100 @@ -76,7 +76,7 @@ }; /* - * Return true iff the given shape fits in the given position, + * Return true if the given shape fits in the given position, * taking the current board into account. */ int