Preserve U+FEFF in quoted filenames

src/patch/parse.ts

@@ -398,7 +398,7 @@ export function parsePatch(uniDiff: string): StructuredPatch[] {
               bytes.push(parseInt(s.substring(j + 1, j + 4), 8));
               j += 4;
             }
-            result += new TextDecoder('utf-8').decode(new Uint8Array(bytes));
+            result += new TextDecoder('utf-8', {ignoreBOM: true}).decode(new Uint8Array(bytes));
             continue; // j already points at the next character
           }
           // Note that in C, there are also three kinds of hex escape sequences:

test/patch/parse.js

@@ -1342,6 +1342,15 @@ index 0000000..ce01362
         }]);
     });
 
+    it('should preserve a U+FEFF character in quoted filenames', function() {
+      for (const fileName of ['\uFEFFnote.txt', 'a\uFEFFnote.txt', 'a/\uFEFFnote.txt', 'a\uFEFF\uFEFFnote.txt']) {
+        const [patch] = parsePatch(createPatch(fileName, 'old\n', 'new\n'));
+        expect(patch.oldFileName).to.equal(fileName);
+        expect(patch.newFileName).to.equal(fileName);
+        expect(patch.index).to.equal(fileName);
+      }
+    });
+
     it('should parse `diff --git` with unquoted filenames containing spaces (same old and new)', function() {
       expect(parsePatch(
 `diff --git a/file with spaces.txt b/file with spaces.txt