fix(core): authorize patch move destinations (#38133)

packages/core/test/patch.test.ts

@@ -40,6 +40,18 @@ describe("Patch", () => {
     expect(() => parse("*** Begin Patch\n*** Add File: add.txt\n+added")).toThrow(
       "The last line of the patch must be '*** End Patch'",
     )
+    expect(() => parse("extra\n*** Begin Patch\n*** End Patch")).toThrow(
+      "The first line of the patch must be '*** Begin Patch'",
+    )
+    expect(() => parse("*** Begin Patch\n*** Add File: add.txt\n+added\n*** End Patch\nextra")).toThrow(
+      "The last line of the patch must be '*** End Patch'",
+    )
+  })
+
+  test("allows whitespace after the end marker", () => {
+    expect(parse("*** Begin Patch\n*** Add File: add.txt\n+added\n*** End Patch\n \t\n")).toEqual([
+      { type: "add", path: "add.txt", contents: "added" },
+    ])
   })
 
   test("strips a heredoc wrapper", () => {
@@ -169,6 +181,25 @@ describe("Patch", () => {
     ).toBe('He said "hi"\n')
   })
 
+  test("matches Unicode minus signs and spaces", () => {
+    expect(
+      Patch.derive("minus.txt", [{ oldLines: ["value - 1"], newLines: ["value - 2"] }], "value − 1\n")
+        .content,
+    ).toBe("value - 2\n")
+    const spaces = ["\u00A0", "\u2002", "\u2003", "\u2004", "\u2005", "\u2006", "\u2007", "\u2008", "\u2009", "\u200A", "\u202F", "\u205F", "\u3000"]
+    spaces.forEach(
+      (space) => {
+        expect(
+          Patch.derive(
+            "spaces.txt",
+            [{ oldLines: ["hello world"], newLines: ["hello there"] }],
+            `hello${space}world\n`,
+          ).content,
+        ).toBe("hello there\n")
+      },
+    )
+  })
+
   test("matches EOF-anchored chunks from the end", () => {
     expect(
       Patch.derive(