rm obsolete gd.data.length -> pointData.name logic in Fx.hover

- which is now handled during defaults,
  where one-trace graphs have no `'name'` hoverinfo flag by default
- this fixes the set `hoverinfo: 'all'` + 1 trace graph hover labels,
  the name label is now properly displayed.

Author: etpinard

src/components/fx/hover.js

@@ -354,11 +354,11 @@ function _hover(gd, evt, subplot) {
             trace: trace,
             xa: xaArray[subploti],
             ya: yaArray[subploti],
-            name: (gd.data.length > 1 || trace.hoverinfo.indexOf('name') !== -1) ? trace.name : undefined,
             // point properties - override all of these
             index: false, // point index in trace - only used by plotly.js hoverdata consumers
             distance: Math.min(distance, constants.MAXDIST), // pixel distance or pseudo-distance
             color: Color.defaultLine, // trace color
+            name: trace.name,
             x0: undefined,
             x1: undefined,
             y0: undefined,
@@ -724,7 +724,9 @@ function createHoverText(hoverData, opts) {
         else if(d.yLabel === undefined) text = d.xLabel;
         else text = '(' + d.xLabel + ', ' + d.yLabel + ')';
 
-        if(d.text && !Array.isArray(d.text)) text += (text ? '<br>' : '') + d.text;
+        if(d.text && !Array.isArray(d.text)) {
+            text += (text ? '<br>' : '') + d.text;
+        }
 
         // if 'text' is empty at this point,
         // put 'name' in main label and don't show secondary label

test/jasmine/tests/hover_label_test.js

@@ -154,7 +154,7 @@ describe('hover info', function() {
             expect(d3.selectAll('g.axistext').size()).toEqual(1);
             expect(d3.selectAll('g.hovertext').size()).toEqual(1);
             expect(d3.selectAll('g.axistext').select('text').html()).toEqual('0.388');
-            expect(d3.selectAll('g.hovertext').select('text').selectAll('tspan').size()).toEqual(2);
+            expect(d3.selectAll('g.hovertext').select('text.nums').selectAll('tspan').size()).toEqual(2);
             expect(d3.selectAll('g.hovertext').selectAll('tspan')[0][0].innerHTML).toEqual('1');
             expect(d3.selectAll('g.hovertext').selectAll('tspan')[0][1].innerHTML).toEqual('hover text');
         });