Cal10n fails if a property looks like this:
"KEY = " or more spaces after the equals sign. The exception is:
Exception in thread "main" java.lang.IllegalStateException: Unexpected token Token(EOL)
at ch.qos.cal10n.util.Parser.E(Parser.java:76)
at ch.qos.cal10n.util.Parser.parseAndPopulate(Parser.java:60)
at ch.qos.cal10n.util.CAL10NResourceBundle.read(CAL10NResourceBundle.java:57)
at ch.qos.cal10n.util.CAL10NResourceBundle.<init>(CAL10NResourceBundle.java:50)
at ch.qos.cal10n.util.CAL10NResourceBundleFinder.makePropertyResourceBundle(CAL10NResourceBundleFinder.java:83)
at ch.qos.cal10n.util.CAL10NResourceBundleFinder.getBundle(CAL10NResourceBundleFinder.java:51)
at ch.qos.cal10n.MessageConveyor.lookup(MessageConveyor.java:111)
at ch.qos.cal10n.MessageConveyor.getMessage(MessageConveyor.java:77)

Regular java.util.Properties does not fail.