added docmentation in os.test.py

Author: glaukiol1

os/os.test.py

@@ -1,13 +1,13 @@
 import os
 
-print("os.error: ", os.error)
+print("os.error:", os.error) # prints <class 'OSError'>
 print()
-print("$HOME: ", os.environ.get("HOME")) # prints $HOME variable
+print("$HOME:", os.environ.get("HOME")) # prints $HOME variable
 print()
-print("cwd():", os.getcwd())
+print("cwd():", os.getcwd()) # prints current working directory
 print()
-print("chdir():", os.chdir(os.environ.get("HOME")))
+print("chdir():", os.chdir(os.environ.get("HOME"))) # changes the current working directory to $HOME
 print()
-print("cwd() after chdir():", os.getcwd())
+print("cwd() after chdir():", os.getcwd()) # should print $HOME dir
 print()
-print("getenv(\"HOME\"):", os.getenv("HOME"))
+print("getenv(\"HOME\"):", os.getenv("HOME")) # should print $HOME dir