mangling examples

[Alex Samuel]

Now that substitutions are unconditional (with regards to length of
the substitued text vs the length of the substitution token), these
two should now exhibit substitutions:

  _Zrm1X1X        Ret? operator%(X, X)
  _ZplR1XR1X      Ret? operator+(X&, X&) 

I think they should be `_Zrm1XS0_' and `_ZplR1XS1_', respectively.