fix typo

ecdsa.h

@@ -52,11 +52,11 @@ typedef struct {
 #define MAX_ADDR_RAW_SIZE (4 + 40)
 // bottle neck is segwit bech32:
 // 4 human readable prefix + 1 separator + 64 data + 6 checksum + 1 NUL
-// the standard says 83 characters in hrp, but currently all coins use only 2
-#define MAX_ADDR_SIZE (4+1+64+6+1)
+// the standard says 83 characters in hrp, but currently all coins use max 4
+#define MAX_ADDR_SIZE (4 + 1 + 64 + 6 + 1)
 // 4 byte prefix + 32 byte privkey + 1 byte compressed marker
 #define MAX_WIF_RAW_SIZE (4 + 32 + 1)
-// (4+32+1 + 4 [checksum]) * 8 / log2(58) plus NUL.
+// (4 + 32 + 1 + 4 [checksum]) * 8 / log2(58) plus NUL.
 #define MAX_WIF_SIZE (57)
 
 void point_copy(const curve_point *cp1, curve_point *cp2);