Fixed typos in docs

types/forecast.go

@@ -12,8 +12,7 @@ type ForecastEntity struct {
 	Wind      Wind       `json:"wind"`
 }
 
-// The Forecast data type, representing the an set
-// of ForecastEntity
+// The Forecast data type, representing a set of ForecastEntity
 type Forecast struct {
-	Forecast []ForecastEntity
+    Forecast []ForecastEntity `json:"forecast"`
 }

types/statDB.go

@@ -18,7 +18,7 @@ func InitDB() *StatDB {
 }
 
 func (statDB *StatDB) AddStatistic(cityName string, weather Weather) {
-	key := fmt.Sprintf("%s@%s", weather.Date.Date, cityName)
+	key := fmt.Sprintf("%s@%s", weather.Date.Date.Format("2006-01-02"), cityName)
 
 	// Insert weather statistic into the database only if it isn't present
 	if _, isPresent := statDB.db[key]; isPresent {