Koen De Groote 905eb422f6 Use StringBuilder to construct a String instead of relying on appending where possible (#24753)
This PR revolves around places in the code where introducing a StringBuilder might make the construction
of a String easier to follow and also, maybe avoid a case where the compiler's very safe way of introducing 
StringBuilder instead of String might not always be optimal for performance.
2017-05-18 12:02:29 +02:00
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