codegen: improve "could not find field" error message#233

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fnune wants to merge 2 commits intographql-rust:masterfrom

fnune:improve-error-messages

Commits on Mar 31, 2019

codegen: improve "could not find field" error message
fnune
committed

Commits on Apr 4, 2019

to be squashed: use itertools for formatting
fnune
committed