Regular Expression \w

[Jim Heavey]

I see that I can use \w which is the same as [a-bA-Z_0-9], but does this
mean it allows spaces? What is the "_" do in that pattern?

 

[Ken Cox [Microsoft MVP]]

That expression means any letter, any number, or the underscore character.
Spaces wouldn't count.

http://bioregex.stanford.edu/orna/regex/regular-expressions.htm