Improve error formatting
Improve error formatting

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1849284 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: ed6b27d35654049bcac41cca40d4bb0ebef36ad7
benbenw/jmeter,apache/jmeter,etnetera/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,benbenw/jmeter,etnetera/jmeter,etnetera/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,apache/jmeter