* Refactor parse mode out of getTransclusionTarget
* Refactor missing transclusion target
* Add a test to avoid regressions on the handling of macros vs procedures
* Refactor condition logic
* Preparing to split getTransclusionTarget into two separate functions
* Split getTransclusionTarget into getTransclusionTargetIncludingParseTreeNodes
* Resolve another inefficiency
The transclusion target was sometimes being parsed twice when transcluding as text/plain
Associated test results are also made more consistent
* Simplify method naming
* Neatening up
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