fix shaders format

data/shaders/lambert.glsl

@@ -1,20 +1,26 @@
 [[vertex]]
+
 uniform mat4 mvp;
+
 in vec4 pos;
 in vec3 nor;
 in vec2 uvs;
 out vec3 n;
+
 void main()
 {
-   n = nor;
-   gl_Position = mvp * pos;
+    n = nor;
+    gl_Position = mvp * pos;
 }
 
 [[fragment]]
+
 uniform mediump vec3 light_dir;
 uniform mediump float ambient;
+
 in mediump vec3 n;
 out mediump vec4 frag;
+
 void main()
 {
     mediump float d = max(0.0, dot(normalize(n), light_dir));