Core: whitespace cleanup, reduce double blank line to single (#25795)

* Core/Misc: fix double empty line

* worldserver.conf

(cherry picked from commit a32b6b8ac4)

src/server/database/Database/Field.h

@@ -116,7 +116,6 @@ class TC_DATABASE_API Field
             return buf;
         }
 
-
         bool IsNull() const
         {
             return data.value == nullptr;