Don't render empty text

nim-version/fide.nim

@@ -104,16 +104,16 @@ proc main =
     renderer.clear()
 
     for i, line in buffer.lines:
+      if isEmptyOrWhitespace(line):
+        continue
       let
         textColor = color(0, 0, 0, 0)
         surface = ttf.renderTextBlended(font, line, textColor)
         texture = renderer.createTextureFromSurface(surface)
 
       sdlFailIf surface.isNil: "Could not render text surface"
-      # var r = rect(0, cint(i * 20), surface.w, surface.h)
-      # echo "W ", *surface.w "H ", *surface.h
+      var r = rect(0, cint(i * 20), surface.w, surface.h)
 
-      var r = rect(0, cint(i * 20), 100, 20)
       renderer.copy texture, nil, addr r
 
       surface.freeSurface