minor symfony#10403 Update debug.rst (Dmitry Vishin)

This PR was submitted for the 4.1 branch but it was merged into the 3.4 branch instead (closes symfony#10403).

Discussion
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Update debug.rst

This is a correction of messages for "fr" block after described steps (as it tested for v4.1)

Commits
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61f7a9b Update debug.rst

Author: javiereguiluz

translation/debug.rst

@@ -161,22 +161,22 @@ in the ``fr`` locale equals to the message in the ``en`` locale. This is a
 special case because the untranslated message id equals its translation in
 the ``en`` locale.
 
-If you copy the content of the translation file in the ``en`` locale, to the
+If you copy the content of the translation file in the ``en`` locale to the
 translation file in the ``fr`` locale and run the command, you will get:
 
 .. code-block:: terminal
 
     $ php bin/console debug:translation fr AcmeDemoBundle
 
     ----------  ------------------  ----------------------  -------------------------------
-     State      Id                  Message Preview (fr)    Fallback Message Preview (en)
+     State       Id                  Message Preview (fr)    Fallback Message Preview (en)
     ----------  ------------------  ----------------------  -------------------------------
      fallback    Symfony is great    Symfony is great        Symfony is great
     ----------  ------------------  ----------------------  -------------------------------
 
 You can see that the translations of the message are identical in the ``fr``
-and ``en`` locales which means this message was probably copied from French
-to English and maybe you forgot to translate it.
+and ``en`` locales which means this message was probably copied from English
+to French and maybe you forgot to translate it.
 
 By default, all domains are inspected, but it is possible to specify a single
 domain: