internal/core/debug: simplify logic of debug visualization

Remove the special case for lets. This caused some
nodes to be dropped. These nodes are relevant for
upcoming algorithmic changes, so by dropping special
handling of lets we ensure that they are shown.

Signed-off-by: Marcel van Lohuizen <[email protected]>
Change-Id: If49d214326d4f688e505ef95c9e74caadab62cb4
Reviewed-on: https://cue.gerrithub.io/c/cue-lang/cue/+/1199270
Reviewed-by: Daniel Martí <[email protected]>
Reviewed-by: Matthew Sackman <[email protected]>
TryBot-Result: CUEcueckoo <[email protected]>
Unity-Result: CUE porcuepine <[email protected]>

internal/core/adt/debug.go

@@ -551,15 +551,7 @@ func (m *mermaidContext) cc(cc *closeContext) {
 		case PARENT:
 			w = node
 			name = m.pstr(d.dependency)
-		case EVAL:
-			if cc.Label().IsLet() {
-				// Do not show eval links for let nodes, as they never depend
-				// on the parent node. Alternatively, link them to the root
-				// node instead.
-				return
-			}
-			fallthrough
-		case ARC, NOTIFY, DISJUNCT, COMP:
+		case EVAL, ARC, NOTIFY, DISJUNCT, COMP:
 			w = global
 			indentLevel = 1
 			name = m.pstr(d.dependency)