terminology and typo fixed

wb_interpolate.py

@@ -16,7 +16,7 @@
 from polynomial import polynomialsOver
 
 # n is the total number of messages send out == total number of nodes
-# k is the total number of shared secret, k = t + 1 with degree t polinomial 
+# k is the total number of code symbols, k = t + 1 with degree t polynomial
 def makeEncoderDecoder(n, k, p):
 	if not k <= n <= p:
 		raise Exception("Must have k <= n <= p but instead had (n,k,p) == (%r, %r, %r)" % (n,k,p))