new_contents: #!/usr/local/bin/python
  from string import Template
  a="Hello,%s,%s."
  b=('world','%python')
  c=a%b
  print c
  d="This is %.3f"
  e=3.4567
  f=d % e
  print f 
  x="ihihihi"
  g=Template("HAHAH,$x,yeah")
  h=g.substitute(x="ihihihi")
  print h
  
subject: Add string test.