Recursively counts and prints a table of the number of lines within
read-access files having one of the given Extensions found in the
current directory or one of its sub-directories. Prints the results
in line-count descending order with the total count appearing first
against an asterisk, standing for all lines counted.
Counts lines in files starting at Directory and using Options.
Counts for each file concurrently in order to maintain high
performance.
Arguments:
Pairs
- is a list of atom-integer pairs where the relative path
of a matching text file is the first pair-element, and the number of
lines counted is the second pair-element.