Programming Ruby 3.3 (5?th Edition):

Title: Programming Ruby 3.3 – page 517

Under the sub-heading Regexp on page 517, the second paragraph under that heading, first line should read “…which is two forward slashes…” (not “…foreword slashes…” as currently reads). Human editors should catch “wrong word choice” errors like this, even homophones like this!

Oops… that page number should be 511… Under the sub-heading Regexp on page 511, the second paragraph under that heading, first line should read “…which is two forward slashes…”