ec: white space fixes

It is advised to use ?w=0 in comparing this commit.

src/ec.js

@@ -94,6 +94,7 @@ function pointFpEquals(other) {
   if (other == this) return true;
   if (this.isInfinity()) return other.isInfinity();
   if (other.isInfinity()) return this.isInfinity();
+
   var u, v;
   // u = Y2 * Z1 - Y1 * Z2
   u = other.y.toBigInteger().multiply(this.z).subtract(this.y.toBigInteger().multiply(other.z)).mod(this.curve.q);
@@ -130,6 +131,7 @@ function pointFpAdd(b) {
       if (u.signum() === 0) {
           return this.twice(); // this == b, so double
       }
+
       return this.curve.getInfinity(); // this = -b, so infinity
   }
 
@@ -161,9 +163,11 @@ function pointFpTwice() {
 
   // w = 3 * x1^2 + a * z1^2
   var w = x1.square().multiply(THREE);
+
   if (a.signum() !== 0) {
     w = w.add(this.z.square().multiply(a));
   }
+
   w = w.mod(this.curve.q);
   // x3 = 2 * y1 * z1 * (w^2 - 8 * x1 * y1^2 * z1)
   var x3 = w.square().subtract(x1.shiftLeft(3).multiply(y1sqz1)).shiftLeft(1).multiply(y1z1).mod(this.curve.q);
@@ -205,6 +209,7 @@ function pointFpMultiply(k) {
 // Compute this*j + x*k (simultaneous multiplication)
 function pointFpMultiplyTwo(j,x,k) {
   var i;
+
   if (j.bitLength() > k.bitLength())
     i = j.bitLength() - 1;
   else
@@ -410,6 +415,5 @@ ECPointFp.prototype.validate = function () {
   return true;
 };
 
-
 module.exports = ECCurveFp;
 module.exports.ECPointFp = ECPointFp;