fix some code with obvious wrong coding style

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16918)
diff --git a/demos/digest/EVP_MD_stdin.c b/demos/digest/EVP_MD_stdin.c
index 71a3d32..43a820f 100644
--- a/demos/digest/EVP_MD_stdin.c
+++ b/demos/digest/EVP_MD_stdin.c
@@ -124,7 +124,7 @@
 int main(void)
 {
     int result = 1;
-    BIO *input = BIO_new_fd( fileno(stdin), 1 );
+    BIO *input = BIO_new_fd(fileno(stdin), 1);
 
     if (input != NULL) {
         result = demonstrate_digest(input);