Merge branch '3.4' into 4.1

* 3.4:
  how to handle AWS partial reverse proxy headers
  Update debug.rst

Author: javiereguiluz

translation/debug.rst

@@ -104,16 +104,11 @@ To inspect all messages in the ``fr`` locale for the application, run:
 
     $ php bin/console debug:translation fr
 
-    +----------+------------------+----------------------+-------------------------------+
-    | State(s) | Id               | Message Preview (fr) | Fallback Message Preview (en) |
-    +----------+------------------+----------------------+-------------------------------+
-    | o        | Symfony is great | J'aime Symfony       | Symfony is great              |
-    +----------+------------------+----------------------+-------------------------------+
-
-    Legend:
-      x  Missing message
-      o  Unused message
-      =  Same as the fallback message
+    ---------  ------------------  ----------------------  -------------------------------
+     State      Id                  Message Preview (fr)    Fallback Message Preview (en)
+    ---------  ------------------  ----------------------  -------------------------------
+     unused     Symfony is great    J'aime Symfony          Symfony is great
+    ---------  ------------------  ----------------------  -------------------------------
 
 It shows you a table with the result when translating the message in the ``fr``
 locale and the result when the fallback locale ``en`` would be used. On top
@@ -129,16 +124,11 @@ output:
 
     $ php bin/console debug:translation fr
 
-    +----------+------------------+----------------------+-------------------------------+
-    | State(s) | Id               | Message Preview (fr) | Fallback Message Preview (en) |
-    +----------+------------------+----------------------+-------------------------------+
-    |          | Symfony is great | J'aime Symfony       | Symfony is great              |
-    +----------+------------------+----------------------+-------------------------------+
-
-    Legend:
-      x  Missing message
-      o  Unused message
-      =  Same as the fallback message
+    ---------  ------------------  ----------------------  -------------------------------
+     State      Id                  Message Preview (fr)    Fallback Message Preview (en)
+    ---------  ------------------  ----------------------  -------------------------------
+                Symfony is great    J'aime Symfony          Symfony is great
+    ---------  ------------------  ----------------------  -------------------------------
 
 The state is empty which means the message is translated in the ``fr`` locale
 and used in one or more templates.
@@ -150,16 +140,11 @@ for the ``fr`` locale and run the command, you will get:
 
     $ php bin/console debug:translation fr
 
-    +----------+------------------+----------------------+-------------------------------+
-    | State(s) | Id               | Message Preview (fr) | Fallback Message Preview (en) |
-    +----------+------------------+----------------------+-------------------------------+
-    | x =      | Symfony is great | J'aime Symfony       | Symfony is great              |
-    +----------+------------------+----------------------+-------------------------------+
-
-    Legend:
-      x  Missing message
-      o  Unused message
-      =  Same as the fallback message
+    ---------  ------------------  ----------------------  -------------------------------
+     State      Id                  Message Preview (fr)    Fallback Message Preview (en)
+    ---------  ------------------  ----------------------  -------------------------------
+     missing    Symfony is great    J'aime Symfony          Symfony is great
+    ---------  ------------------  ----------------------  -------------------------------
 
 The state indicates the message is missing because it is not translated in
 the ``fr`` locale but it is still used in the template. Moreover, the message
@@ -174,16 +159,11 @@ translation file in the ``fr`` locale and run the command, you will get:
 
     $ php bin/console debug:translation fr
 
-    +----------+------------------+----------------------+-------------------------------+
-    | State(s) | Id               | Message Preview (fr) | Fallback Message Preview (en) |
-    +----------+------------------+----------------------+-------------------------------+
-    |   =      | Symfony is great | J'aime Symfony       | Symfony is great              |
-    +----------+------------------+----------------------+-------------------------------+
-
-    Legend:
-      x  Missing message
-      o  Unused message
-      =  Same as the fallback message
+    ----------  ------------------  ----------------------  -------------------------------
+     State      Id                  Message Preview (fr)    Fallback Message Preview (en)
+    ----------  ------------------  ----------------------  -------------------------------
+     fallback    Symfony is great    J'aime Symfony          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