Updates to evidence marks and requirements. No changes to code.

FossilOrigin-Name: 62d38308b519a5362f559b296a0cf1acccf8f673

src/main.c

@@ -827,6 +827,8 @@ static int connectionIsBusy(sqlite3 *db){
 */
 static int sqlite3Close(sqlite3 *db, int forceZombie){
   if( !db ){
+    /* EVIDENCE-OF: R-63257-11740 Calling sqlite3_close() or
+    ** sqlite3_close_v2() with a NULL pointer argument is a harmless no-op. */
     return SQLITE_OK;
   }
   if( !sqlite3SafetyCheckSickOrOk(db) ){