Fix aspect ratio of ASCII renderer in the GUI

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

packages/wolf_3d_engine/lib/src/ascii_rasterizer.dart

@@ -55,11 +55,11 @@ class AsciiRasterizer extends Rasterizer {
   // Terminal characters are usually twice as tall as they are wide.
   // We override the base multiplier to squish sprites horizontally.
   @override
-  double get aspectMultiplier => 2.0;
+  double get aspectMultiplier => 1.0;
 
   // Squish the entire 3D projection vertically by 50% to counteract tall terminal fonts
   @override
-  double get verticalStretch => 1.8;
+  double get verticalStretch => 1.0;
 
   // Intercept the base render call to initialize our text grid
   @override