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Chapter 10.1.2 (Commands (finding a string (use the escape character \…

- - - - find all combos of three digits
        
        \d\d\d
  - - - color vs colour example colou?r
  - - - to do anything BUT 3 and 7, add a ^ in the brackets
  - - - preceding character can be matched 0 to infinite number of times
        
        Example: \w* will match a string of letter characters a-z of any length (infinite matches)
        
        using the + specifies that the pattern must occur at least once