Merge revspec-related blocks

Author: cruessler

asyncgit/src/sync/diff.rs

@@ -355,23 +355,17 @@ pub fn get_diff(
 ),
 );
 
-let old_revspec = if stage {
-format!("HEAD:{p}")
-} else {
-format!(":{p}")
-};
-let (old_blob_id, old_root) =
-resolve_revspec(&gix_repo, &old_revspec);
-
 // TODO:
 // Make sure that the revspec logic is correct, i. e. uses the correct syntax for all the
 // relevant cases.
-let new_revspec = if stage {
-format!(":{p}")
+let (old_revspec, new_revspec) = if stage {
+(format!("HEAD:{p}"), format!(":{p}"))
 } else {
-p.to_string()
+(format!(":{p}"), p.to_string())
 };
 
+let (old_blob_id, old_root) =
+resolve_revspec(&gix_repo, &old_revspec);
 let (new_blob_id, new_root) =
 resolve_revspec(&gix_repo, &new_revspec);