Update logging.adoc

Fixed broken monospace by making it unconstrained.

src/docs/asciidoc/jme3/advanced/logging.adoc

@@ -76,7 +76,7 @@ To deactivate the default logger for a release, you set the log level to only re
 Logger.getLogger(””).setLevel(Level.SEVERE);
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-During development or a beta test, you can tune down the default logger, and set the log level to only report `warning`s:
+During development or a beta test, you can tune down the default logger, and set the log level to only report ``warning``s:
 
 [source,java]
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