cargo fmt (nightly)

Author: PeterW-LWL

src/error.rs

@@ -52,7 +52,7 @@ impl fmt::Display for Error {
 impl std::error::Error for Error {}
 
 macro_rules! error_wrap {
-    ($f: ty, $e: expr) => {
+    ($f:ty, $e:expr) => {
         impl From<$f> for Error {
             fn from(f: $f) -> Error {
                 $e(f)