#4012 Allowing multiple lines before the mindmap statement

packages/mermaid-mindmap/src/mindmap.spec.js

@@ -354,6 +354,18 @@ root
     expect(mm.nodeId).toEqual('root');
     expect(mm.children.length).toEqual(2);
 
+    const child = mm.children[0];
+    expect(child.nodeId).toEqual('A');
+    const child2 = mm.children[1];
+    expect(child2.nodeId).toEqual('B');
+  });
+  it('MMP-24 Handle rows above the mindmap declarations', function () {
+    let str = '\n \nmindmap\nroot\n A\n \n\n B';
+    mindmap.parse(str);
+    const mm = mindmap.yy.getMindmap();
+    expect(mm.nodeId).toEqual('root');
+    expect(mm.children.length).toEqual(2);
+
     const child = mm.children[0];
     expect(child.nodeId).toEqual('A');
     const child2 = mm.children[1];

packages/mermaid-mindmap/src/parser/mindmap.jison

@@ -67,9 +67,16 @@ start
 // %{	: info document 'EOF' { return yy; } }
 	: MINDMAP document  { return yy; }
 	| MINDMAP NL document  { return yy; }
-  |	SPACELIST MINDMAP document  { return yy; }
+  |	spaceLines MINDMAP document  { return yy; }
+  |	spaceLines MINDMAP NL document  { return yy; }
 	;
 
+spaceLines
+  : SPACELINE
+  | spaceLines SPACELINE
+  | spaceLines NL
+  ;
+
 stop
   : NL {yy.getLogger().trace('Stop NL ');}
   | EOF {yy.getLogger().trace('Stop EOF ');}