Doc update

src/db/db/dbDeepRegion.cc

@@ -1916,6 +1916,7 @@ DeepRegion::run_check (db::edge_relation_type rel, bool different_polygons, cons
 
   //  force different polygons in the different properties case to skip intra-polygon checks
   if (pc_always_different (options.prop_constraint)) {
+    //  TODO: this forces merged primaries, so maybe that is not a good optimization?
     different_polygons = true;
   }
 

src/drc/drc/built-in-macros/_drc_layer.rb

@@ -2630,7 +2630,7 @@ CODE
     # @brief Returns the intersection points of intersecting edge segments for two edge collections
     # @synopsis layer.intersections(edges)
     # This operation is similar to the "&" operator, but it does also report intersection points
-    # between non-colinear, but intersection edges. Such points are reported as point-like,
+    # between non-colinear, but intersecting edges. Such points are reported as point-like,
     # degenerated edge objects.
     #
     # This method is available for edge layers. The argument must be an edge layer.