Corrected spacing and comments

src/internal.c

@@ -7548,6 +7548,7 @@ void FreeKeyExchange(WOLFSSL* ssl)
 
     /* Cleanup digest buffer */
     if (ssl->buffers.digest.buffer) {
+        /* Only free if digest buffer was not set using SetDigest */
         if (!ssl->options.dontFreeDigest) {
             XFREE(ssl->buffers.digest.buffer, ssl->heap, DYNAMIC_TYPE_DIGEST);
         }