fixup! Tor Browser localization migration scripts.

Bug 42202: Migrate crypto safety strings to Fluent.

tools/torbrowser/l10n/migrations/bug-42202-crypto-safety.py

+import fluent.syntax.ast as FTL
+from fluent.migrate.helpers import VARIABLE_REFERENCE, transforms_from
+from fluent.migrate.transforms import REPLACE
+
+
+def migrate(ctx):
+    legacy_path = "cryptoSafetyPrompt.properties"
+
+    ctx.add_transforms(
+        "tor-browser.ftl",
+        "tor-browser.ftl",
+        transforms_from(
+            """
+crypto-safety-prompt-title = { COPY(path, "cryptoSafetyPrompt.cryptoTitle") }
+crypto-safety-prompt-reload-button = { COPY(path, "cryptoSafetyPrompt.primaryAction") }
+crypto-safety-prompt-dismiss-button = { COPY(path, "cryptoSafetyPrompt.secondaryAction") }
+""",
+            path=legacy_path,
+        )
+        + [
+            # Replace "%1$S" and "%2$S" with "{ $address }" and "{ $host }"
+            FTL.Message(
+                id=FTL.Identifier("crypto-safety-prompt-body"),
+                value=REPLACE(
+                    legacy_path,
+                    "cryptoSafetyPrompt.cryptoBody",
+                    {
+                        "%1$S": VARIABLE_REFERENCE("address"),
+                        "%2$S": VARIABLE_REFERENCE("host"),
+                    },
+                ),
+            ),
+        ],
+    )