Vladislav Kuznecov

*Big thanks to @swarley for helping* # Summary This PR fixes bug with `session_id` instance variable of `Bot`. *Some theory which maintainers are aware of, but is required for understanding:...

[Q] NULL vs N/A

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Hello! I was trying to calculate following formula using Dentaku: `IF(revenue - expense = NULL, expected_profit, revenue - expense)`. I created following Ruby script to test it: ```ruby require 'dentaku'...

We've stumbled upon some xlsx file which had all cell references in lowercase. Here is a PR which makes library case-indifferent when it comes to cell references by calling `upcase`...