Create outlet formatter once rather than for each line

The output padding is based upon the longest name of processes and thus never
changes at runtime so we can optimize things a bit by only creating the output
formatter pattern once at startup.

outlet.go

@@ -12,7 +12,7 @@ import (
 )
 
 type OutletFactory struct {
-	Padding int
+	LeftFormatter string
 
 	sync.Mutex
 }
@@ -80,8 +80,7 @@ func (of *OutletFactory) WriteLine(left, right string, leftC, rightC ct.Color, i
 	if colorize {
 		ct.ChangeColor(leftC, true, ct.None, false)
 	}
-	formatter := fmt.Sprintf("%%-%ds | ", of.Padding)
-	fmt.Printf(formatter, left)
+	fmt.Printf(of.LeftFormatter, left)
 
 	if colorize {
 		if isError {

start.go

@@ -279,7 +279,7 @@ func runStart(cmd *Command, args []string) {
 	handleError(err)
 
 	of := NewOutletFactory()
-	of.Padding = pf.LongestProcessName(concurrency)
+	of.LeftFormatter = fmt.Sprintf("%%-%ds | ", pf.LongestProcessName(concurrency))
 
 	f := &Forego{
 		outletFactory: of,