Merge #163: Typo, add subscript i

44001ad Typo fix, add subscript i (Kalle Rosenbaum)

Pull request description:

ACKs for top commit:
  real-or-random:
    ACK 44001ad

Tree-SHA512: a0d472e8708a467c471be033113bff9f3c6ab5990751173c6150452efdb403f1af8d61314e8358fa817a9a20cbeefd1c33154231a4d1d68ca09ced64dbb8d2b2

Author: jonasnick

src/modules/musig/musig-spec.mediawiki

@@ -89,7 +89,7 @@ The algorithm ''IsSecond(pk<sub>1..u</sub>, i)'' is defined as:
 
 The algorithm ''KeyAggCoeff(pk<sub>1..u</sub>, i)'' is defined as:
 * Let ''L = HashKeys(pk<sub>1..u</sub>)''.
-* Return 1 if ''IsSecond(pk<sub>1..u</sub>, i)'', otherwise return  ''int(hash<sub>KeyAgg coefficient</sub>(L || pk) mod n''.
+* Return 1 if ''IsSecond(pk<sub>1..u</sub>, i)'', otherwise return  ''int(hash<sub>KeyAgg coefficient</sub>(L || pk<sub>i</sub>) mod n''.
 
 == Applications ==