Source block for converter is overwritten

[albeanth]

While homogenizing components into one another to create a homogenized block, the _sourceBlock (i.e., the original block to do the conversion on) is overwritten with the newBlock (i.e., the homogenized block). This seems like a potentially dangerous and unnecessary action. Is there a reason this is done? On the class constructor for BlockConverter (the parent class for the ComponentMerger class), there is even an instance attribute called convertedBlock. Why not set the homogenized block to that variable?

armi/armi/reactor/converters/blockConverters.py

Line 94 in 0977ee4

self._sourceBlock = newBlock