From 909238c0580e7306929396b9dfbf43c6f4f341bf Mon Sep 17 00:00:00 2001
From: Roquette <2771025+jmrtt@users.noreply.github.com>
Date: Fri, 2 Oct 2020 00:38:46 +0100
Subject: [PATCH] Fix period escaping.

---
 escape.go      |  3 +++
 escape_test.go | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/escape.go b/escape.go
index 91e68d9..3b16c4f 100644
--- a/escape.go
+++ b/escape.go
@@ -78,6 +78,9 @@ func isID(s string) bool {
 		if c == '/' {
 			return false
 		}
+		if c == '.' {
+			return false
+		}
 		i++
 	}
 	return pos
diff --git a/escape_test.go b/escape_test.go
index 856d6fd..b0af266 100644
--- a/escape_test.go
+++ b/escape_test.go
@@ -46,11 +46,23 @@ func TestEscape(t *testing.T) {
 	if err := g.AddNode("asdf asdf", "a/b", nil); err != nil {
 		t.Fatal(err)
 	}
+	if err := g.AddNode("asdf asdf", "c.d", nil); err != nil {
+		t.Fatal(err)
+	}
+	if err := g.AddNode("asdf asdf", "e-f", nil); err != nil {
+		t.Fatal(err)
+	}
+	if err := g.AddNode("asdf asdf", "12_34", nil); err != nil {
+		t.Fatal(err)
+	}
 	s := g.String()
 	if !strings.HasPrefix(s, `digraph "asdf adsf" {
 	"kasdf99 99"->7;
+	"12_34";
 	"a &lt;&lt; b";
 	"a/b";
+	"c.d";
+	"e-f";
 	"kasdf99 99" [ URL="<a" ];
 	7 [ URL="<a" ];