File «disk_usage.py» it’s the original program, and «disk_usage_fiexd.py» it´s the original program fixed (Other version):
whit «diff» comand, we compare the two files, and save in «disk_usage.diff» :
diff -u disk_usage.py disk_usage_fixed.py > disk_usage.diff
The «disk_usage.diff» file contend the differences between the files.
When we will apply the changes, usa the «patch» command:
patch disk_usage.py < disk_usage.diff
We can see the program file original has been modified.
Jesus