Unify the log/formatting_*.go files for all unix like OSs

This switches to using the +build tag in log/formatting so that a single file
can be used to build for *NIX machines (everything that isn't 'windows').

log/formatting_linux.go

@@ -1,38 +0,0 @@
-package log
-
-const (
-	rightArrow = "▶"
-	leftArrow  = "◀"
-)
-
-const (
-	// colorBlack   = "\033[30m"
-	colorRed = "\033[31m"
-	// colorGreen   = "\033[32m"
-	colorYellow  = "\033[33m"
-	colorBlue    = "\033[34m"
-	colorMagenta = "\033[35m"
-	colorCyan    = "\033[36m"
-	// colorWhite   = "\033[37m"
-)
-
-func (s Severity) color() string {
-	switch s {
-	case DebugLevel:
-		return colorCyan
-	case InfoLevel:
-		return colorBlue
-	case WarningLevel:
-		return colorYellow
-	case ErrorLevel:
-		return colorRed
-	case CriticalLevel:
-		return colorMagenta
-	default:
-		return ""
-	}
-}
-
-func endColor() string {
-	return "\033[0m"
-}

log/formatting_unix.go

@@ -1,3 +1,5 @@
+// +build !windows
+
 package log
 
 const (

log/formatting_windows.go

@@ -1,3 +1,5 @@
+// +build windows
+
 package log
 
 import (