code: public LinkedList<Patch> patch_deepCopy(LinkedList<Patch> patches) {
          LinkedList<Patch> patchesCopy = new LinkedList<Patch>();
          for (Patch aPatch : patches) {
              Patch patchCopy = new Patch();
              for (Diff aDiff : aPatch.diffs) {
                  Diff diffCopy = new Diff(aDiff.operation, aDiff.text);
                  patchCopy.diffs.add(diffCopy);
              }
              patchCopy.start1 = aPatch.start1;
              patchCopy.start2 = aPatch.start2;
              patchCopy.length1 = aPatch.length1;
              patchCopy.length2 = aPatch.length2;
              patchesCopy.add(patchCopy);
          }
          return patchesCopy;
      }
docs: Given an array of patches, return another array that is identical.
  
  @param patches
  Array of Patch objects.
  @return Array of Patch objects.