Use larger outline.

src/app.d

@@ -240,7 +240,7 @@ OutlinedGlyph get_glyph(uint char_code)
     {
         return outlined_glyphs[char_code];
     }
-    return outlined_glyphs[char_code] = new OutlinedGlyph(font, char_code, 80);
+    return outlined_glyphs[char_code] = new OutlinedGlyph(font, char_code, 150);
 }
 
 void draw_string(int x, int y, string s)