Tor Browser localization migration scripts.

tools/torbrowser/l10n_migrations/bug-41333-new-about-tor.py

+from fluent.migrate.helpers import transforms_from
+
+
+def migrate(ctx):
+    ctx.add_transforms(
+        "tor-browser.ftl",
+        "tor-browser.ftl",
+        transforms_from(
+            """
+menu-open-tor-manual =
+    .label = { COPY(path, "aboutTor.torbrowser_user_manual.label") }
+    .accesskey = { COPY(path, "aboutTor.torbrowser_user_manual.accesskey") }
+
+tor-browser-home-heading-stable = { COPY(path, "aboutTor.ready.label") }
+tor-browser-home-heading-testing = { COPY(path, "aboutTor.alpha.ready.label") }
+
+tor-browser-home-duck-duck-go-input =
+    .placeholder = { COPY(path, "aboutTor.search.label") }
+
+tor-browser-home-message-introduction = { COPY(path, "aboutTor.ready2.label") }
+""",
+            path="aboutTor.dtd",
+        ),
+    )