Remove trailing spaces

examples/shaders/resources/shaders/glsl120/grayscale.fs

@@ -14,10 +14,10 @@ void main()
 {
     // Texel color fetching from texture sampler
     vec4 texelColor = texture2D(texture0, fragTexCoord)*colDiffuse*fragColor;
-    
+
     // Convert texel color to grayscale using NTSC conversion weights
     float gray = dot(texelColor.rgb, vec3(0.299, 0.587, 0.114));
-    
+
     // Calculate final fragment color
     gl_FragColor = vec4(gray, gray, gray, texelColor.a);
 }