Clean up lint in various packages

Changes fall into one of the following:

- gofmt -s
- receiver name is inconsistent
- omit unused 2nd value from range
- godoc comment formed incorrectly
- err assigned and not used
- if block ends with a return statement followed by else

tpl/fmt/fmt.go

@@ -37,7 +37,7 @@ func (ns *Namespace) Printf(format string, a ...interface{}) string {
 
 }
 
-// Print returns string representation of the passed arguments ending with a newline.
+// Println returns string representation of the passed arguments ending with a newline.
 func (ns *Namespace) Println(a ...interface{}) string {
 	return _fmt.Sprintln(a...)
 }