Testing: delete RegExp[$&]
Testing: delete RegExp[$']
Testing: delete RegExp[$*]
Testing: delete RegExp[$+]
Testing: delete RegExp[$1]
Testing: delete RegExp[$2]
Testing: delete RegExp[$3]
Testing: delete RegExp[$4]
Testing: delete RegExp[$5]
Testing: delete RegExp[$6]
Testing: delete RegExp[$7]
Testing: delete RegExp[$8]
Testing: delete RegExp[$9]
Testing: delete RegExp[$_]
Testing: delete RegExp[$`]
Testing: delete RegExp[input]
Testing: delete RegExp[lastMatch]
Testing: delete RegExp[lastParen]
Testing: delete RegExp[leftContext]
Testing: delete RegExp[length]
Testing: delete RegExp[multiline]
Testing: delete RegExp[name]
Testing: delete RegExp[rightContext]