style: remove unnecessary braces in RevisionRef::from_str (#48)

Author: ErichDonGubler

src/main.rs

@@ -184,9 +184,7 @@ impl FromStr for RevisionRef {
                 project: project.to_owned(),
                 hash: hash.to_owned(),
             })
-            .ok_or({
-                "no dividing colon found; expected revision ref. of the form <project>:<hash>"
-            })
+            .ok_or("no dividing colon found; expected revision ref. of the form <project>:<hash>")
     }
 }