A line modifier changes how a Regular Expression is processed
REFind (‘(?i)This’, ‘this’) = 1
(?i) means perform a case insensitive search
REFindNoCase('(?x)is a', 'this is a isa') = 11
(?x) means perform a search ignoring spaces
REFindNoCase('(?m)^line3', ‘line1
Line2
line3)') = 13
(?m) means pay attention to the lines
