fix(doctest): fix assertions in doctests

Author: ndyakov

doctests/geo_index_test.go

@@ -199,11 +199,11 @@ func ExampleClient_geoindex() {
 	// OK
 	// OK
 	// OK
-	// {1 [{product:46885 <nil> <nil> <nil> map[$:{"city":"Denver","description":"Navy Blue Slippers","location":"-104.991531, 39.742043","price":45.99}]}]}
+	// {1 [{product:46885 <nil> <nil> <nil> map[$:{"city":"Denver","description":"Navy Blue Slippers","location":"-104.991531, 39.742043","price":45.99}] <nil>}]}
 	// OK
 	// OK
 	// OK
 	// OK
 	// OK
-	// {1 [{shape:4 <nil> <nil> <nil> map[$:[{"geom":"POINT (2 2)","name":"Purple Point"}]]}]}
+	// {1 [{shape:4 <nil> <nil> <nil> map[$:[{"geom":"POINT (2 2)","name":"Purple Point"}]] <nil>}]}
 }

doctests/home_json_example_test.go

@@ -329,5 +329,5 @@ func ExampleClient_search_hash() {
 	// STEP_END
 
 	// Output:
-	// {1 [{huser:3 <nil> <nil> <nil> map[age:35 city:Tel Aviv email:[email protected] name:Paul Zamir]}]}
+	// {1 [{huser:3 <nil> <nil> <nil> map[age:35 city:Tel Aviv email:[email protected] name:Paul Zamir] <nil>}]}
 }

doctests/search_quickstart_test.go

@@ -258,5 +258,5 @@ func ExampleClient_search_qs() {
 	// Output:
 	// Documents found: 10
 	// {1 [{bicycle:0 <nil> <nil> <nil> map[$:{"brand":"Velorim","condition":"new","description":"Small and powerful, the Jigger is the best ride for the smallest of tikes! This is the tiniest kids’ pedal bike on the market available without a coaster brake, the Jigger is the vehicle of choice for the rare tenacious little rider raring to go.","model":"Jigger","price":270}]}]}
-	// {1 [{bicycle:4 <nil> <nil> <nil> map[$:{"brand":"Noka Bikes","condition":"used","description":"Whether you want to try your hand at XC racing or are looking for a lively trail bike that's just as inspiring on the climbs as it is over rougher ground, the Wilder is one heck of a bike built specifically for short women. Both the frames and components have been tweaked to include a women’s saddle, different bars and unique colourway.","model":"Kahuna","price":3200}]}]}
+	// {1 [{bicycle:4 <nil> <nil> <nil> map[$:{"brand":"Noka Bikes","condition":"used","description":"Whether you want to try your hand at XC racing or are looking for a lively trail bike that's just as inspiring on the climbs as it is over rougher ground, the Wilder is one heck of a bike built specifically for short women. Both the frames and components have been tweaked to include a women’s saddle, different bars and unique colourway.","model":"Kahuna","price":3200}] <nil>}]}
 }