Fix typos and spellings

src/ecmult_gen_impl.h

@@ -213,7 +213,7 @@ static void secp256k1_ecmult_gen(const secp256k1_ecmult_gen_context *ctx, secp25
                  * but this would simply discard the bits that fall off at the bottom,
                  * and thus, for example, bitdata could still have only two values if we
                  * happen to shift by exactly 31 positions. We use a rotation instead,
-                 * which ensures that bitdata doesn't loose entropy. This relies on the
+                 * which ensures that bitdata doesn't lose entropy. This relies on the
                  * rotation being atomic, i.e., the compiler emitting an actual rot
                  * instruction. */
                 uint32_t bitdata = secp256k1_rotr32(recoded[bit_pos >> 5], bit_pos & 0x1f);