packer: don't change background color in UI

CHANGELOG.md

 ## 0.4.1 (unreleased)
 
+BUG FIXES:
 
+* core: Don't change background color on CLI anymore, making things look
+  a tad nicer in some terminals.
 
 ## 0.4.0 (November 19, 2013)
 

packer/ui.go

@@ -106,7 +106,7 @@ func (u *ColoredUi) colorize(message string, color UiColor, bold bool) string {
 		attr = 1
 	}
 
-	return fmt.Sprintf("\033[%d;%d;40m%s\033[0m", attr, color, message)
+	return fmt.Sprintf("\033[%d;%dm%s\033[0m", attr, color, message)
 }
 
 func (u *ColoredUi) supportsColors() bool {

packer/ui_test.go

@@ -19,19 +19,19 @@ func TestColoredUi(t *testing.T) {
 
 	ui.Say("foo")
 	result := readWriter(bufferUi)
-	if result != "\033[1;33;40mfoo\033[0m\n" {
+	if result != "\033[1;33mfoo\033[0m\n" {
 		t.Fatalf("invalid output: %s", result)
 	}
 
 	ui.Message("foo")
 	result = readWriter(bufferUi)
-	if result != "\033[0;33;40mfoo\033[0m\n" {
+	if result != "\033[0;33mfoo\033[0m\n" {
 		t.Fatalf("invalid output: %s", result)
 	}
 
 	ui.Error("foo")
 	result = readWriter(bufferUi)
-	if result != "\033[1;31;40mfoo\033[0m\n" {
+	if result != "\033[1;31mfoo\033[0m\n" {
 		t.Fatalf("invalid output: %s", result)
 	}
 }