Regular Expressions 101

Explanation
Pro

Negative Lookbehind(?<![\[|\(|\.\?][^[\]]*)

Character Class[\[|\(|\.\?]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Negated Character Class[^[\]]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

\s{2,}any whitespace character, repeated at least 2 times

Positive Lookahead(?=\w+)

\w+any word character, repeated at least once

Negative Lookahead(?![^[\]]*\])

Negated Character Class[^[\]]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Global pattern flags

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

Ready to run

26 tokens

(?<![\[|\(|\.\?][^[\]]*)\s{2,}(?=\w+)(?![^[\]]*\])