fixup! Tor Browser localization migration scripts.

Bug 42211: Migrate new identity strings to Fluent.

tools/torbrowser/l10n/migrations/bug-42211-new-identity.py

+import fluent.syntax.ast as FTL
+from fluent.migrate.helpers import TERM_REFERENCE, transforms_from
+from fluent.migrate.transforms import REPLACE
+
+
+def migrate(ctx):
+    legacy_path = "newIdentity.properties"
+
+    ctx.add_transforms(
+        "base-browser.ftl",
+        "base-browser.ftl",
+        transforms_from(
+            """
+menu-new-identity =
+    .label = { COPY(path, "new_identity") }
+    .accesskey = { COPY(path, "new_identity_menu_accesskey") }
+appmenuitem-new-identity =
+    .label = { COPY(path, "new_identity_sentence_case") }
+toolbar-new-identity =
+    .label = { COPY(path, "new_identity_sentence_case") }
+    .tooltiptext = { toolbar-new-identity.label }
+
+new-identity-dialog-title = { COPY(path, "new_identity_prompt_title") }
+new-identity-dialog-never-ask-checkbox =
+    .label = { COPY(path, "new_identity_ask_again") }
+
+new-identity-blocked-home-ignore-button = { COPY(path, "new_identity_home_load_button") }
+""",
+            path=legacy_path,
+        )
+        + [
+            # Replace "%S" with "{ -brand-short-name }" in confirm button.
+            FTL.Message(
+                id=FTL.Identifier("new-identity-dialog-confirm"),
+                value=None,
+                attributes=[
+                    FTL.Attribute(
+                        id=FTL.Identifier("label"),
+                        value=REPLACE(
+                            legacy_path,
+                            "new_identity_restart",
+                            {"%1$S": TERM_REFERENCE("brand-short-name")},
+                        ),
+                    ),
+                ],
+            ),
+        ],
+    )