the literal (3210 / 408 / 2016)
.*any character (except for line terminators), repeated any number of times
"GET the literal text "GET (case sensitive) Negative Lookahead(?!\/robots\.txt) \/the literal / (4710 / 578 / 2F16)
robotsthe literal text robots (case sensitive) \.the literal . (4610 / 568 / 2E16)
txtthe literal text txt (case sensitive) .*any character (except for line terminators), repeated any number of times
\sany whitespace character
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string