Document the function of Fixer.Fixer.
Document the function of Fixer.Fixer.

Ignore-this: 54d54c4d956c5f7597f58cc3bd0b0de6

darcs-hash:0aa193e28efe00e7f5a7914a90eaba0fc151d5ef

dpwright/jhc,dpwright/jhc,dpwright/jhc,dpwright/jhc