shell: flash: add padding in print_hex()

source/shell/flash.c

@@ -64,7 +64,7 @@ static void print_hex_ascii(const char *buf, size_t len)
 		
 		for (i = 0; i < 16; ++i) {
 			c = (i < n) ? buf[i] : 0;
-			printf("%x", c);
+			printf("%02x ", c);
 		}
 
 		printf(" ");