Bug 1763312 - [devtools] Remove sourceeditor.dtd. r=jdescottes,flod.

It was only used in the style editor, so we migrate the existing string
to styleeditor.ftl.

Differential Revision: https://phabricator.services.mozilla.com/D143011

devtools/client/locales/en-US/sourceeditor.dtd

@@ -1,17 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<!-- LOCALIZATION NOTE : FILE This file contains the Source Editor component
-  - strings. The source editor component is used within the Style Editor. -->
-
-<!-- LOCALIZATION NOTE : FILE Do not translate commandkeys -->
-
-<!-- LOCALIZATION NOTE : FILE The correct localization of this file might be to
-  - keep it in English, or another language commonly spoken among web developers.
-  - You want to make that choice consistent across the developer tools.
-  - A good criteria is the language in which you'd find the best
-  - documentation on web development on the web. -->
-
-<!ENTITY gotoLineCmd.label         "Jump to Line…">
-<!ENTITY gotoLineCmd.accesskey     "J">

devtools/client/locales/en-US/styleeditor.ftl

@@ -25,3 +25,6 @@ styleeditor-open-link-new-tab =
     .label = Open Link in New Tab
 styleeditor-copy-url =
     .label = Copy URL
+styleeditor-go-to-line =
+    .label = Jump to Line…
+    .accesskey = J

devtools/client/styleeditor/index.xhtml

@@ -5,8 +5,6 @@
 <!DOCTYPE window [
 <!ENTITY % editMenuStrings SYSTEM "chrome://global/locale/editMenuOverlay.dtd">
  %editMenuStrings;
-<!ENTITY % sourceEditorStrings SYSTEM "chrome://devtools/locale/sourceeditor.dtd">
- %sourceEditorStrings;
 ]>
 
 <?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
@@ -69,9 +67,7 @@
                 accesskey="&findAgainCmd.accesskey;" command="cmd_findAgain"/>
       <menuseparator/>
       <menuitem id="se-menu-gotoLine"
-          label="&gotoLineCmd.label;"
-          accesskey="&gotoLineCmd.accesskey;"
-          key="key_gotoLine"
+          data-l10n-id="styleeditor-go-to-line"
           command="cmd_gotoLine"/>
     </menupopup>
     <menupopup id="sidebar-context" incontentshell="false">

python/l10n/fluent_migrations/bug_1763312_devtools_sourceeditor.py

@@ -0,0 +1,24 @@
+# coding=utf8
+
+# Any copyright is dedicated to the Public Domain.
+# http://creativecommons.org/publicdomain/zero/1.0/
+
+from fluent.migrate.transforms import COPY
+from fluent.migrate.helpers import transforms_from
+
+
+def migrate(ctx):
+    """Bug 1763312 - Move sourceeditor.dtd to fluent, part {index}."""
+
+    ctx.add_transforms(
+        "devtools/client/styleeditor.ftl",
+        "devtools/client/styleeditor.ftl",
+        transforms_from(
+            """
+styleeditor-go-to-line =
+  .label = { COPY(from_path, "gotoLineCmd.label") }
+  .accesskey = { COPY(from_path, "gotoLineCmd.accesskey") }
+""",
+            from_path="devtools/client/sourceeditor.dtd",
+        ),
+    )