Check if file changed on Update.

1 files changed, 11 insertions, 9 deletions

diff --git a/src/actions/update.rs b/src/actions/update.rs
index a4a64b3..05379c1 100644
--- a/src/actions/update.rs
+++ b/src/actions/update.rs
@@ -97,15 +97,17 @@ fn get_new_history_for_file<FS: Fs>(
 
             let changes = ContentChange::diff(&old_content, &new_content);
 
-            // TODO: Check if file was changed.
-
-            let mut new_history = file_history;
-            new_history.add_change(FileChange {
-                change_index: cursor + 1,
-                variant: FileChangeVariant::Updated(changes),
-            });
-
-            Ok(Some((history_file, new_history)))
+            if !changes.is_empty() {                
+                let mut new_history = file_history;
+                new_history.add_change(FileChange {
+                    change_index: cursor + 1,
+                    variant: FileChangeVariant::Updated(changes),
+                });
+                
+                Ok(Some((history_file, new_history)))
+            } else {
+                Ok(None)
+            }
         }
     }
 }