fix fmt warnings.

README.md

@@ -103,6 +103,14 @@ With print statement output.
 cargo test -- --nocapture
 ```
 
+#### Run Cargo fmt
+Run fmt to catch formatting errors.
+
+```
+rustup component add rustfmt
+cargo fmt --all -- --check
+```
+
 #### Run Clippy
 Run Clippy tests to catch common lints and mistakes.
 

src/mp4box/meta.rs

@@ -17,10 +17,7 @@ impl<R: Read + Seek> ReadBox<&mut R> for MetaBox {
 
         let (version, _) = read_box_header_ext(reader)?;
         if version != 0 {
-            return Err(Error::UnsupportedBoxVersion(
-                BoxType::UdtaBox,
-                version,
-            ));
+            return Err(Error::UnsupportedBoxVersion(BoxType::UdtaBox, version));
         }
 
         let mut ilst = None;