ch.qos.logback.classic.Logger.createChildByName() may throw an exception if it finds a DOT or a DOLLAR in the childName passed to it.

Currently the following text is generated:

throw new IllegalArgumentException("For logger [" + this.name
+ "] child name [" + childName
+ " passed as parameter, may not include '.' after index"
+ (this.name.length() + 1));

It turns out that the separator of a Logger name is DOT, but for the last string not containing any DOT it is DOLLAR. The exception should thus read, adding some missing formatting:

throw new IllegalArgumentException("For logger [" + this.name
+ "], child name [" + childName
+ "] passed as parameter shall not include the separators '"
+ CoreConstants.DOT + ' or ' + CoreConstants.DOLLAR +
+ "' after position "
+ (this.name.length() + 1));