[librsvg] aspect_ratio.rs: Add test for parsing "none"

[Federico Mena Quintero <federico src gnome org>]

commit bf7c14c34a680cf6b8e96ca547e02b5977063ed2
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Feb 1 22:46:47 2017 -0600

    aspect_ratio.rs: Add test for parsing "none"

 rust/src/aspect_ratio.rs |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/rust/src/aspect_ratio.rs b/rust/src/aspect_ratio.rs
index bf44ab5..67c4e1d 100644
--- a/rust/src/aspect_ratio.rs
+++ b/rust/src/aspect_ratio.rs
@@ -315,7 +315,7 @@ impl FromStr for AspectRatio {
             defer: defer,
             align: match align {
                 Align::None => { Align::None },
-                Align::Aligned { align, ..} => {
+                Align::Aligned { align, .. } => {
                     Align::Aligned {
                         align: align,
                         fit: fit_mode
@@ -393,6 +393,10 @@ mod tests {
 
     #[test]
     fn parses_valid_strings () {
+        assert_eq! (AspectRatio::from_str ("defer none"),
+                    Ok (AspectRatio { defer: true,
+                                      align: Align::None }));
+
         assert_eq! (AspectRatio::from_str ("XmidYmid"),
                     Ok (AspectRatio { defer: false,
                                       align: Align::Aligned { align: AlignMode::XmidYmid,