Cleaned up exported func comments per golint

errors.go

@@ -7,20 +7,24 @@ import (
 	"strings"
 )
 
+// OsExiter is the function used when the app exits. If not set defaults to os.Exit.
 var OsExiter = os.Exit
 
 // ErrWriter is used to write errors to the user. This can be anything
 // implementing the io.Writer interface and defaults to os.Stderr.
 var ErrWriter io.Writer = os.Stderr
 
+// MultiError is an error that wraps multiple errors.
 type MultiError struct {
 	Errors []error
 }
 
+// NewMultiError creates a new MultiError. Pass in one or more errors.
 func NewMultiError(err ...error) MultiError {
 	return MultiError{Errors: err}
 }
 
+// Error implents the error interface.
 func (m MultiError) Error() string {
 	errs := make([]string, len(m.Errors))
 	for i, err := range m.Errors {