Removed need to keep track of counter, which reduces complexity

and chance of introducing errors, by slicing the the units tuple
by the percision.  Removed __main__ because nosetest --with-coverage
was flagging it.  It was un-nessasary.

Special thanks to Eric Rasmussen who inspired this commit.

ago.py

@@ -25,17 +25,11 @@ def human(dt, precision=2, past_tense='{} ago', future_tense='in {}'):
 
     d = delta2dict( delta )
     hlist = [] 
-    count = 0
     units = ( 'year', 'day', 'hour', 'minute', 'second', 'microsecond' )
-    for unit in units:
-        if count >= precision: break # met precision
+    for unit in units[:precision]: # strip units to precision
         if d[ unit ] == 0: continue # skip 0's
         s = '' if d[ unit ] == 1 else 's' # handle plurals
         hlist.append( '%s %s%s' % ( d[unit], unit, s ) )
-        count += 1
     human_delta = ', '.join( hlist )
     return the_tense.format(human_delta) 
 
-if __name__ == "__main__": 
-    from test_ago import test_output
-    test_output()

test_ago.py

@@ -70,7 +70,7 @@ def test_valid_future_dict():
     assert past_dict['minute'] == 27
     assert past_dict['microsecond'] == 963
 
-def test_output():
+def example_usage():
     """Test and example usage"""
 
     print '\nTest past tense:\n'