add (M)record shape with javadoc link to Records.java

Signed-off-by: Stefan Niederhauser <[email protected]>

Author: nidi3

graphviz-java/src/main/java/guru/nidi/graphviz/attribute/Records.java

@@ -22,6 +22,7 @@ public final class Records {
     private static final String
             SHAPE = "shape",
             RECORD = "record",
+            M_RECORD = "Mrecord",
             LABEL = "label";
 
     private Records() {
@@ -32,15 +33,15 @@ public static Attributes<ForNode> label(String label) {
     }
 
     public static Attributes<ForNode> mLabel(String label) {
-        return attrs(attr(SHAPE, "Mrecord"), attr(LABEL, label));
+        return attrs(attr(SHAPE, M_RECORD), attr(LABEL, label));
     }
 
     public static Attributes<ForNode> of(String... recs) {
         return attrs(attr(SHAPE, RECORD), attr(LABEL, String.join("|", recs)));
     }
 
     public static Attributes<ForNode> mOf(String... recs) {
-        return attrs(attr(SHAPE, "Mrecord"), attr(LABEL, String.join("|", recs)));
+        return attrs(attr(SHAPE, M_RECORD), attr(LABEL, String.join("|", recs)));
     }
 
     public static String rec(String tag, String label) {

graphviz-java/src/main/java/guru/nidi/graphviz/attribute/Shape.java

@@ -22,6 +22,13 @@
 public final class Shape extends SingleAttributes<String, ForNode> {
     private static final String SHAPE = "shape";
 
+    /**
+     * Records are better supported by the {@link Records} class.
+     */
+    public static final Shape
+            RECORD = new Shape("record"),
+            M_RECORD = new Shape("Mrecord");
+
     public static final Shape
             BOX = new Shape("box"),
             ELLIPSE = new Shape("ellipse"),
@@ -48,7 +55,6 @@ public final class Shape extends SingleAttributes<String, ForNode> {
             INV_HOUSE = new Shape("invhouse"),
             M_DIAMOND = new Shape("Mdiamond"),
             M_SQUARE = new Shape("Msquare"),
-            M_RECORD = new Shape("Mrecord"),
             M_CIRCLE = new Shape("Mcircle"),
             RECT = new Shape("rect"),
             RECTANGLE = new Shape("rectangle"),