minor #7275 [Console] Reword a subheading of console/logging.rst (javiereguiluz)

This PR was squashed before being merged into the 2.7 branch (closes #7275).

Discussion
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[Console] Reword a subheading of console/logging.rst

Because of the typography we use, the "non-0 exit statuses" heading reads as "nono exit statuses" (instead of "non-zero ..."):

![console-heading](https://cloud.githubusercontent.com/assets/73419/21296011/99817e48-c561-11e6-86fb-429d6546e1c1.png)

I propose a minor reword to avoid this problem.

Commits
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b1ec1f0 [Console] Reword a subheading of console/logging.rst

Author: xabbuh

console/logging.rst

@@ -167,12 +167,15 @@ service configuration. Your method receives a
 :class:`Symfony\\Component\\Console\\Event\\ConsoleExceptionEvent` object,
 which has methods to get information about the event and the exception.
 
-Logging non-0 Exit Statuses
+.. _logging-non-0-exit-statuses:
+
+Logging Error Exit Statuses
 ---------------------------
 
 The logging capabilities of the console can be further extended by logging
-non-0 exit statuses. This way you will know if a command had any errors, even
-if no exceptions were thrown.
+commands that return error exit statuses, which are any number different than
+zero. This way you will know if a command had any errors, even if no exceptions
+were thrown.
 
 First configure a listener for console terminate events in the service container: