Fix output of build script

build.rs

@@ -106,14 +106,15 @@ mod gen {
         Ok(v) => fill_from_location(&mut f, Path::new(&v)).unwrap(),
         Err(e) => {
             f.write_all(
-b"        files.clear();" // Silence mutability warning
-).unwrap();
+                b"        files.clear();" // Silence mutability warning
+            ).unwrap();
             println!("cargo:warning=location not found: {}, please set proper INITFS_FOLDER.", e);
         }
     }
 
-    f.write_all(b"        files
+    f.write_all(b"
+        files
     }
 }
-    ").unwrap();
+").unwrap();
 }