Merge #654: Fix typo (∞)

271582b Fix typo (practicalswift)

Pull request description:

  Fix ∞ typo :-)

ACKs for top commit:
  real-or-random:
    ACK 271582b

Tree-SHA512: 41b8134e2572707d8a1ea1e5a79fffcc206b6093ec761ee1f93e4529506553c9cc8e3839b046210468f6c4c0d7af9d78a3e7e546bb0026656f1db1c793244296

src/tests.c

@@ -2240,7 +2240,7 @@ void test_ge(void) {
     /* Test batch gej -> ge conversion with many infinities. */
     for (i = 0; i < 4 * runs + 1; i++) {
         random_group_element_test(&ge[i]);
-        /* randomly set half the points to infinitiy */
+        /* randomly set half the points to infinity */
         if(secp256k1_fe_is_odd(&ge[i].x)) {
             secp256k1_ge_set_infinity(&ge[i]);
         }