I'm reading More Math Into LaTeX, and it introduces the command of
\framebox at section 3.9.2 on page 91-92. There are the two following code examples which show different output:
The book explains as follows:
\totalheightis the height of 1, which becomes the width of the box. The total height of the box, however, is the height of the character 1 to which you have to add twice the
\fboxsep, the separation between the contents of the box and the frame, defined as 3 points, and twice the
\fboxrule, the width of the line, or rule, defined as 0.4 points. These lengths are in general also added to the width of the box, but not in this case, because we forced the width to equal the height of the character.
Then how should I understand the last sentences and the totally different output? Hope someone could give me a hand.