Two asterisk symbols

[thaopham03]

In section 5.3 Git Basics, the two asterisks < ** > serve a different purpose as mentioned in the book "You can also use two asterisks to match nested directories; a/**/z would match a/z, a/b/z, a/b/c/z, and so on."
=> I suggest instead of indexing one asterisk (as it was already indexed in 4.2), we should index < ** >.