texttemplate: fix scattergeo variable names

Author: antoinerg

src/traces/scattergeo/attributes.js

@@ -66,7 +66,7 @@ module.exports = overrideAll({
         ].join(' ')
     }),
     texttemplate: texttemplateAttrs({editType: 'plot'}, {
-        keys: ['latlon', 'text']
+        keys: ['lat', 'lon', 'location', 'text']
     }),
     hovertext: extendFlat({}, scatterAttrs.hovertext, {
         description: [

test/image/baselines/texttemplate_scatter.png

@@ -17,7 +17,7 @@
         "Toronto",
         "Vancouver"
       ],
-      "texttemplate": "%{text}: (%{lonlat[0]:.0f}, %{lonlat[1]:0.f}): %{customdata:.2s}",
+      "texttemplate": "%{text}: (%{lon:.0f}, %{lat:0.f}): %{customdata:.2s}",
       "textposition": "top center",
       "customdata": [1780000, 2930000, 675218],
       "geo": "geo"

test/image/mocks/texttemplate_scatter.json

@@ -446,6 +446,15 @@ describe('Test scattergeo texttemplate:', function() {
         'lat': [45.5, 43.4, 49.13],
         'text': ['Montreal', 'Toronto', 'Vancouver']
     }], '.scattergeo text', [
-        ['%{text}: %{lonlat[0]}, %{lonlat[1]}', ['Montreal: -73.57, 45.5', 'Toronto: -79.24, 43.4', 'Vancouver: -123.06, 49.13']]
+        ['%{text}: %{lon}, %{lat}', ['Montreal: -73.57, 45.5', 'Toronto: -79.24, 43.4', 'Vancouver: -123.06, 49.13']]
+    ]);
+
+    checkTextTemplate([{
+        'type': 'scattergeo',
+        'mode': 'markers+text',
+        'locations': ['Canada'],
+        'locationmode': 'country names'
+    }], '.scattergeo text', [
+        ['%{location}', ['Canada']]
     ]);
 });