Fix display diff

Author: SlyBouhafs

src/util/git.ts

@@ -149,7 +149,12 @@ export const getDiffAgainstMaster = async (
   validateFiles(changedFilesString, lessonOrder, challengeOrder.toString())
 
   const [display, db] = await Promise.all([
-    git.diff([`--color`, `master..${current}`, ...ignoreFileOptions]),
+    git.diff([
+      `--color`,
+      `master..${current}`,
+      '--diff-filter=d',
+      ...ignoreFileOptions,
+    ]),
     git.diff([`master..${current}`, '--diff-filter=d', ...ignoreFileOptions]),
   ])