Typo - Chp 13, Sec 13.5.1, section section

[hardin47]

• Chapter number: 13

• Section number: 13.5.1

• Other location identifier, if any (e.g., figure number, table number, footnote number, etc.): only in the 2ed pdf (not a problem in the html).

• Original text: two problems:
  Section Section 12.1 we learned about a medical consultant...

Section sec-one-prop-null-boot

• Suggestion for corrected text: make correct links

• Justification for suggestion: typo

Note: the "section section" typo happens 2 additional times in the 2ed pdf:

page 205 section 12.3.2: Section Section 16.1 also provides a longer discussion...
page 226 section 13.4.1: In Section Section 11.2 we were introduced to the opportunity cost study...

[hardin47]

the "section section" typo from chapter 12 also shows up in the html rendering (in addition to the pdf).