Resolve map_unwrap_or pedantic clippy lint

    error: called `map(<f>).unwrap_or(<a>)` on an `Option` value. This can be done more directly by calling `map_or(<a>, <f>)` instead
      --> tests/repo/mod.rs:73:8
       |
    73 |     if path.extension().map(|e| e != "rs").unwrap_or(true) {
       |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
       |
       = note: `-D clippy::map-unwrap-or` implied by `-D clippy::pedantic`
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_unwrap_or
    help: use `map_or(<a>, <f>)` instead
       |
    73 -     if path.extension().map(|e| e != "rs").unwrap_or(true) {
    73 +     if path.extension().map_or(true, |e| e != "rs") {
       |

tests/repo/mod.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::if_then_panic, clippy::map_unwrap_or)]
+#![allow(clippy::if_then_panic)]
 
 mod progress;
 
@@ -70,7 +70,7 @@ pub fn base_dir_filter(entry: &DirEntry) -> bool {
     if path.is_dir() {
         return true; // otherwise walkdir does not visit the files
     }
-    if path.extension().map(|e| e != "rs").unwrap_or(true) {
+    if path.extension().map_or(true, |e| e != "rs") {
         return false;
     }