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The attached image shows the first paragraph on page 433. Toward the end of the first line, the toggling between serif and sans serif fonts was mixed up, and for much of the remainder of the paragraph characters that should be in the sans serif font (characters representing code) are printed in the serif font. The characters that should be in the serif font (the normal English text) are mistakenly printed in the sans serif font. In the attached image, I highlighted the characters that have the incorrect font in light blue.

There also seems to be an errant single-quote character at the end of the section containing the incorrect fonts (it is the final character I highlighted in the image).