def lines_added_to_range(file)
        changes_array = file[:changes].map { |ch| ch.split("..").map(&:to_i) }
        changes_array.map { |e| (e[0]..e[1]).to_a }.flatten!
      end
def lines_added_to_range(file)
        changes_array = file[:changes].map { |ch| ch.split("..").map(&:to_i) }
        changes_array.map { |e| (e[0]..e[1]).to_a }.flatten!
      end
Convert the array from lines_added into spelled-out ranges
 This is a GitControl helper but it's used in Lint
 @see GitControl#lines_added
 @see Lint#relevant_lint

 @example typical output
   lines_added = {changes: ['0..10', '11..14']}
   lines_added_to_range(lines_added)
   # output
   [0,1,2,3,4,5,6,7,8,9,10, 11,12,13,14]

 @return [Hash] changes_array of spelled-out arrays of integers