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Errata
Er·ra'ta noun plural [Latin]

E R R A T U M

[t] means that this is trivial.
[e] means that this is an error: the original is incorrect in a way that could cause confusion for the reader.
[i] means that this is an improvement: the original is correct, but the correction clarifies the text or makes an improvement.
[r] revision, but what was there was not necessarily in error.

Not everything you will find here is correct, but findout yourself ..