index:the literal text index: (case sensitive) \s*any whitespace character, repeated any number of times
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
\s*any whitespace character, repeated any number of times
,the literal , (4410 / 548 / 2C16)
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