remove references to markov chains

cmd/internal/graph/dot/graph.go

@@ -25,13 +25,12 @@ import (
 	"gonum.org/v1/gonum/graph/multi"
 )
 
-// DOTDirectedGraph is a graph representing an absorbing Markov chain.
+// DOTDirectedGraph is a graph to unmarshal DOT graphs.
 type DOTDirectedGraph struct {
 	*igraph.DirectedGraph
 }
 
-// NewDOTDirectedGraph returns an absorbing Markov chain with no nodes or
-// edges.
+// NewDOTDirectedGraph returns a graph with no nodes or edges.
 func NewDOTDirectedGraph() *DOTDirectedGraph {
 	return &DOTDirectedGraph{DirectedGraph: igraph.NewDirectedGraph()}
 }
@@ -47,7 +46,7 @@ func (g *DOTDirectedGraph) NewNode() graph.Node {
 	return &Node{Node: g.DirectedGraph.NewNode()}
 }
 
-// SetLine adds a DOT-aware weighted line to the Markov chain.
+// SetLine adds a DOT-aware weighted line to the graph.
 func (g *DOTDirectedGraph) SetLine(e graph.Line) {
 	g.DirectedGraph.SetWeightedLine(e.(*weightedLine))
 }

cmd/internal/graph/dot/nodes_edges.go

@@ -43,8 +43,7 @@ func (n *Node) DOTID() string {
 }
 
 // weightedLine is a DOT-aware multi.WeightedLine. By being a
-// multi.WeightedLine, it allows for self-loops, which are important for
-// absorbing Markov chains.
+// multi.WeightedLine, it allows for self-loops.
 type weightedLine struct {
 	multi.WeightedLine
 }