// Float32 returns, as a float32, a pseudo-random number in [0.0,1.0).                                                                   
func (r *Rand) Float32() float32 {
        // Same rationale as in Float64: we want to preserve the Go 1 value                                                              
        // stream except we want to fix it not to return 1.0                                                                             
        // This only happens 1/2²⁴ of the time (plus the 1/2⁵³ of the time in Float64).                                                  
again:  
        f := float32(r.Float64())
        if f == 1 {
                goto again // resample; this branch is taken O(very rarely)                                                              
        }
        return f
}