Merge pull request #64 from rluijk/fix-print-helper-typo

small typos in print statement

examples/scripts/functions_called.py

@@ -2,7 +2,7 @@ import sys
 from slither.slither import Slither
 
 if len(sys.argv) != 2:
-    print('python.py function_called.py functions_called.sol')
+    print('python functions_called.py functions_called.sol')
     exit(-1)
 
 # Init slither