Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/elliotchance/concise/inspections/9ba698da-32c6-4363-841d-12faaaf8763c
Merge pull request #234 from elliotchance/scrutinizer-patch-1

Scrutinizer Auto-Fixes
testOnErrorWorksWhenUsingItImmediatelyAfterAnotherConstant
ValueRenderer::render()
ValueRenderer::colorize()
Merge pull request #231 from elliotchance/1.5.1/231-bug-with-on-error

Bug with 'on error' when using single value