pcbnew: Fixup formatting and comments in pcb_painter.cpp

pcbnew/pcb_painter.cpp

@@ -569,8 +569,8 @@ void PCB_PAINTER::draw( const VIA* aVia, int aLayer )
 
     if( aVia->GetViaType() == VIA_BLIND_BURIED && aLayer != LAYER_VIAS_HOLES )
     {
-        // Buried vias are drawn in a special way to indicate the top and bottom layers
-        // Holes however are always drawn in the same way
+        // Outer circles of blind/buried vias are drawn in a special way to indicate the
+        // top and bottom layers
         PCB_LAYER_ID layerTop, layerBottom;
         aVia->LayerPair( &layerTop, &layerBottom );
 
@@ -591,6 +591,7 @@ void PCB_PAINTER::draw( const VIA* aVia, int aLayer )
     }
     else
     {
+        // Draw the outer circles of normal vias and the inner circles for all vias
         m_gal->DrawCircle( center, radius );
     }