Possible typo in Iteration chapter

[narayanan-iyer-pfizer]

"peak" should probably be changed to "peek" in section 26.3.3

Original text: For example, it’s often useful to peak at the first few rows of the data with n_max = 1:

Suggested change: For example, it’s often useful to peek at the first few rows of the data with n_max = 1:

[mine-cetinkaya-rundel]

Thank you!