Docs: fixing docs & comments to work with new stack clearing

basis/compiler/cfg/stacks/clearing/clearing-docs.factor

@@ -44,7 +44,7 @@ HELP: dangerous-insn?
   }
   { $example
     "USING: compiler.cfg.instructions compiler.cfg.registers compiler.cfg.stacks.clearing prettyprint ;"
-    "{ { 0 { } } { 3 { } } } T{ ##call-gc } dangerous-insn?"
+    "{ { 0 { } } { 3 { } } } T{ ##call-gc } dangerous-insn? ."
     "t"
   }
 } ;

basis/compiler/codegen/gc-maps/gc-maps-tests.factor

@@ -105,7 +105,6 @@ cpu x86.64? [
         ] with-variable
     ] unit-test
 
-    ! scrub-d scrub-r gc-roots
     { 9 B{ 32 1 } } [
         32 cfg-w-spill-area-base cfg [
             { 0 24 } <gc-map/spills> 1array

basis/vm/vm-docs.factor

@@ -20,8 +20,6 @@ HELP: vm
 HELP: gc-info
 { $class-description "A struct that defines the sizes of the garbage collection maps for a word. It has the following slots:"
   { $table
-    { { $slot "scrub-d-count" } "Number of datastack scrub bits per callsite." }
-    { { $slot "scrub-r-count" } "Number of retainstack scrub bits per callsite." }
     { { $slot "gc-root-count" } "Number of gc root bits per callsite." }
     { { $slot "derived-root-count" } "Number of derived roots per callsite." }
     { { $slot "return-address-count" } "Number of gc callsites." }

vm/slot_visitor.hpp

@@ -309,8 +309,6 @@ void slot_visitor<Fixup>::visit_callstack(context* ctx) {
 
 template <typename Fixup>
 void slot_visitor<Fixup>::visit_context(context* ctx) {
-  // Callstack is visited first because it scrubs the data and retain
-  // stacks.
   visit_callstack(ctx);
 
   cell ds_ptr = ctx->datastack;