Write a function file_copy() that takes two string parameters (in_file and out_file) and copies the content of in_file into out_file. Assume that in_file exists before file_copy is called. For example, the following would be correct input and output.
>>> file_copy('created_equal.txt', 'copy.txt')
>>> open_f = open('copy.txt')
>>> equal_f = open('created_equal.txt')
>>> equal_f.read() 'We hold these truths to be self-evident,\nthat all men are created equal\n'
