Currently few plugins are making their own methods to convert an object (array) to string. And usually uses different approaches for converting the arrays:
#1 The following methods will convert array to string like "1, 2, 3". They use StringBuffer and append elements one by one.
#2 Another approach that is used, converts the array to List, and then toString() which returns "[1, 2, 3]"
#3 in event plugin the code from the method below prints "[1, 2, 3]" but uses approach similar to #1
The smaller problem is that we have duplicate code. The bigger problem is that the code ... will not work correctly, if the array is from primitive types (see https://issues.apache.org/jira/browse/FELIX-2142).
So my proposal is to add a new utility method,
WebConsoleUtil.toString(Object val, boolean addBracesIfArray);
The other option is to remove addBracesIfArray and always assume, that if it is array, the value is wrapped with  braces.