Console: delay newline rendering until non newline character

src/hulk/console.d

@@ -34,6 +34,9 @@ struct Console
     /** Current page cursor Y position. */
     private static __gshared size_t m_y;
 
+    /** Number of delayed newline characters. */
+    private static __gshared size_t m_newlines;
+
     /**
      * Initialize the console.
      */
@@ -57,12 +60,38 @@ struct Console
     }
 
     /**
-     * Write a character to the console.
+     * Write a character to the console (buffer newlines).
      *
      * @param ch Character to write.
      */
     public static void write(char ch)
     {
+        if (ch == '\n')
+        {
+            m_newlines++;
+        }
+        else
+        {
+            dowrite(ch);
+        }
+    }
+
+    /**
+     * Write a character to the console (no newline buffering).
+     *
+     * @param ch Character to write.
+     */
+    private static void dowrite(char ch)
+    {
+        if (m_newlines != 0u)
+        {
+            size_t newlines = m_newlines;
+            m_newlines = 0u;
+            for (size_t i = 0u; i < newlines; i++)
+            {
+                dowrite('\n');
+            }
+        }
         if (ch == '\n')
         {
             m_x = 0u;