Remove extra -- in help

cmd/main.go

@@ -16,7 +16,7 @@ var options struct {
 	Host    string `short:"h" long:"host" default:"0.0.0.0" description:"the IP to start the server on. Default to 0.0.0.0 (all interfaces)"`
 	Port    uint16 `short:"p" long:"port" default:"5274"`
 	Verbose bool   `short:"v" long:"verbose" description:"Show debug logs"`
-	Tee     bool   `short:"T" long:"--tee" description:"Write the data (and generated timestamp if applicable) in a CSV into stdout in addition to visualizing with the plot"`
+	Tee     bool   `short:"T" long:"tee" description:"Write the data (and generated timestamp if applicable) in a CSV into stdout in addition to visualizing with the plot"`
 
 	Title     string   `short:"t" long:"title" default:"Wesplot" description:"Title of the plot. Defaults to 'Plot'"`
 	YMin      *float64 `short:"m" long:"ymin" description:"The minimum value for y (default: auto scaling)"`