fix comment

panda/src/glgsg/glGraphicsStateGuardian.cxx

@@ -3513,13 +3513,13 @@ set_blend_mode(ColorWriteAttrib::Mode color_write_mode,
       case TransparencyAttrib::M_alpha:
       case TransparencyAttrib::M_alpha_sorted:
       case TransparencyAttrib::M_dual:
-        // Should we really have an "alpha" and an "alpha_sorted" mode,
-        // like Performer does?  (The difference is that "alpha" is with
-        // the write to the depth buffer disabled.)  Or should we just use
-        // the separate depth write transition to control this?  Doing it
-        // implicitly requires a bit more logic here and in the state
-        // management; for now we require the user to explicitly turn off
-        // the depth write.
+        // Should we really have an "alpha" and an "alpha_sorted"
+        // mode, like Performer does?  (The difference is that
+        // "alpha_sorted" is with the write to the depth buffer
+        // disabled.)  Or should we just use the separate depth write
+        // transition to control this?  Doing it implicitly requires a
+        // bit more logic here and in the state management; for now we
+        // require the user to explicitly turn off the depth write.
         enable_multisample_alpha_one(false);
         enable_multisample_alpha_mask(false);
         enable_blend(true);