Eslint fixes (denoland/deno_std#356)

Make warnings fail
Original: https://github.com/denoland/deno_std/commit/4543b563a9a01c8c168aafcbfd9d4634effba7fc

1 files changed, 11 insertions, 6 deletions

diff --git a/fs/walk.ts b/fs/walk.ts
index 1e433e18b..b21044e72 100644
--- a/fs/walk.ts
+++ b/fs/walk.ts
@@ -14,15 +14,20 @@ function patternTest(patterns: RegExp[], path: string): boolean {
   // Forced to reset last index on regex while iterating for have
   // consistent results.
   // See: https://stackoverflow.com/a/1520853
-  return patterns.some(pattern => {
-    let r = pattern.test(path);
-    pattern.lastIndex = 0;
-    return r;
-  });
+  return patterns.some(
+    (pattern): boolean => {
+      let r = pattern.test(path);
+      pattern.lastIndex = 0;
+      return r;
+    }
+  );
 }
 
 function include(f: FileInfo, options: WalkOptions): boolean {
-  if (options.exts && !options.exts.some(ext => f.path.endsWith(ext))) {
+  if (
+    options.exts &&
+    !options.exts.some((ext): boolean => f.path.endsWith(ext))
+  ) {
     return false;
   }
   if (options.match && !patternTest(options.match, f.path)) {