old_contents: 
  class FsharpPackage(GitHubTarballPackage):
  	def __init__(self):
  		GitHubTarballPackage.__init__(self,
  			'fsharp', 'fsharp',
  			'3.0.27',
  			'f3c8ea8bf4831ce6dc30581558fa4a45a078cd55',
  			configure = '')
  
  	def build(self):
  		self.sh ('autoreconf')
  		self.sh ('./configure --prefix="%{prefix}"')
  		self.sh ('make')
  
  FsharpPackage()
  
new_contents: 
  class FsharpPackage(GitHubTarballPackage):
  	def __init__(self):
  		GitHubTarballPackage.__init__(self,
  			'fsharp', 'fsharp',
  			'3.0.31',
  			'b00fa1d2c0de85b21590a5b32527031df8ececf5',
  			configure = '')
  
  	def build(self):
  		self.sh ('autoreconf')
  		self.sh ('./configure --prefix="%{prefix}"')
  		self.sh ('make')
  
  FsharpPackage()
  
subject: Use F# 3.0.31