docs: add Windows instructions for pomerge in translating guide

documentation/translations/translating.rst

@@ -4,6 +4,8 @@
 Translating
 ===========
 
+.. include:: /include/activate-tab.rst
+
 .. highlight::  rest
 
 There are several documentation translations already
@@ -393,8 +395,6 @@ messages, regardless of file paths. To use it, first install the package:
 Then, merge translations from a specific commit (replace :samp:`{COMMIT_HASH}`
 with the commit hash from before the files were moved):
 
-.. TODO: Provide Windows instructions.
-
 .. tab:: Unix
 
     .. code-block:: bash
@@ -411,11 +411,39 @@ with the commit hash from before the files were moved):
         git checkout HEAD -- .
 
         # Merge translations from temporary dir back in
+        shopt -s globstar
         pomerge --from /tmp/old-po-files/**/*.po --to **/*.po --clear
 
         # Clean up temporary dir
         rm -rf /tmp/old-po-files
 
+.. tab:: Windows
+
+    .. code-block:: dosbatch
+
+        rem These commands are to be run in the root of the translation repo
+
+        rem Check out a commit before the move
+        git checkout COMMIT_HASH -- .
+
+        rem Copy translations to a temporary dir
+        xcopy . %TEMP%\old-po-files\ /E /I /Q /Y
+
+        rem Return to the current version
+        git checkout HEAD -- .
+
+        rem Learn translations from temporary dir
+        for /R "%TEMP%\old-po-files" %F in (*.po) do pomerge --from "%F"
+
+        rem Apply translations to current files
+        for /R . %F in (*.po) do pomerge --to "%F"
+
+        rem Clean up translation memory
+        pomerge --clear
+
+        rem Clean up temporary dir
+        rmdir /S /Q "%TEMP%\old-po-files"
+
 After running ``pomerge``, review the changes and commit the updated files.
 You may also need to rewrap the lines (see :pypi:`powrap`).