Fix incorrect interpolation order for labels

Commit f0c9c49 applied an
incorrect interpolation order for the (potentially custom)
section header/label values.

This commit updates the order so that the label text is placed
within the formatting characters as intended.

refs GH-107
refs GH-119

nagios.go

@@ -305,9 +305,9 @@ func (es *ExitState) ReturnCheckResults() {
 
 		fmt.Printf(
 			"%s%s**%s**%s",
-			es.getErrorsLabelText(),
 			CheckOutputEOL,
 			CheckOutputEOL,
+			es.getErrorsLabelText(),
 			CheckOutputEOL,
 		)
 
@@ -333,8 +333,8 @@ func (es *ExitState) ReturnCheckResults() {
 
 			fmt.Printf(
 				"%s**%s**%s",
-				es.getThresholdsLabelText(),
 				CheckOutputEOL,
+				es.getThresholdsLabelText(),
 				CheckOutputEOL,
 			)
 
@@ -365,8 +365,8 @@ func (es *ExitState) ReturnCheckResults() {
 
 			fmt.Printf(
 				"%s**%s**%s",
-				es.getDetailedInfoLabelText(),
 				CheckOutputEOL,
+				es.getDetailedInfoLabelText(),
 				CheckOutputEOL,
 			)