Add DocBlock to WatchConfig (#1467)

* Add DocBlock to WatchConfig

Added a small description of the WatchConfig().
So that you can understand in the ide why you could use it.

* Update viper.go

* update viper.go

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>
Co-authored-by: Márk Sági-Kazár <sagikazarmark@users.noreply.github.com>
Co-authored-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

viper.go

@@ -421,13 +421,18 @@ var SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props
 // SupportedRemoteProviders are universally supported remote providers.
 var SupportedRemoteProviders = []string{"etcd", "etcd3", "consul", "firestore"}
 
+// OnConfigChange sets the event handler that is called when a config file changes.
 func OnConfigChange(run func(in fsnotify.Event)) { v.OnConfigChange(run) }
+
+// OnConfigChange sets the event handler that is called when a config file changes.
 func (v *Viper) OnConfigChange(run func(in fsnotify.Event)) {
 	v.onConfigChange = run
 }
 
+// WatchConfig starts watching a config file for changes.
 func WatchConfig() { v.WatchConfig() }
 
+// WatchConfig starts watching a config file for changes.
 func (v *Viper) WatchConfig() {
 	initWG := sync.WaitGroup{}
 	initWG.Add(1)