minor #7745 [Console] Add a note about escaping format tags (julienfalque, javiereguiluz)

This PR was merged into the 2.7 branch.

Discussion
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[Console] Add a note about escaping format tags

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a798c0e Minor reword
3e65874 Add a note about escaping console format tags

Author: xabbuh

console/coloring.rst

@@ -65,6 +65,12 @@ You can also set these colors and options directly inside the tagname::
     // bold text on a yellow background
     $output->writeln('<bg=yellow;options=bold>foo</>');
 
+.. note::
+
+    If you need to render a tag literally, escape it with a backslash: ``\<info>``
+    or use the :method:`Symfony\\Component\\Console\\Formatter\\OutputFormatter::escape`
+    method to escape all the tags included in the given string.
+
 .. _Cmder: http://cmder.net/
 .. _ConEmu: https://conemu.github.io/
 .. _ANSICON: https://github.com/adoxa/ansicon/releases