Better Regular Expressions

From "The Elements of Good Regex Style" some tips on writing better Regular Expression for efficient, precise pattern-matching:

(cf Fuzzy Proximity (2000-03-18), Snip Pattern (2001-09-06), Reg Explanations (2003-12-03), Regex vs HTML (2020-02-27), Logical AND for Regex (2020-10-28), ...) - ^z - 2020-10-31