WIP: Feature/grains#39

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tehsphinx wants to merge 5 commits intomainfrom

Commits on Dec 28, 2018

grains: add solutions and tests

tehsphinx
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bitfield
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grains: mention cost of formatted error

tehsphinx
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bitfield
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grains: add solution and tests

tehsphinx
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bitfield
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grains: copyedit templates
bitfield
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grains: check for ignored error
bitfield
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