Return a 2-tuple containing (new_string, number). new_string is the string obtained by replacing the leftmost non-overlapping occurrences of the pattern in the source string by the replacement repl. number is the number of substitutions that were made. repl can be either a string or
(pattern, repl, string, count=0, flags=0)
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected