;Task:
Verify that a file called &nbsp; &nbsp; '''input.txt''' &nbsp; &nbsp; and &nbsp; a directory called &nbsp; &nbsp; '''docs''' &nbsp; &nbsp; exist.
 

This should be done twice: &nbsp; 
:::* &nbsp; once for the current working directory, &nbsp; and
:::* &nbsp; once for a file and a directory in the filesystem root.

<br>
Optional criteria (May 2015): &nbsp; verify it works with:
:::* &nbsp; zero-length files
:::* &nbsp; an unusual filename: &nbsp; <big> ''' `Abdu'l-Bahá.txt ''' </big>
<br><br>
