Add --allow-long-tables option to permit wide RST tables

[lukelbd]

I often have very long tables that cannot be shortened and raise line-too-long doc8 errors. For example:

=======================  ======================================================================================================        
Header                   Description
=======================  ======================================================================================================        
Rather long header item  My very extremely long-winded wordy verbose descriptive supercalifragilisticexpialidocious description
=======================  ======================================================================================================        

doc8 has an --allow-long-titles option to prevent line-too-long errors for verbose titles. Could you also add an option to ignore line-too-long errors for very long tables?

[fiendish]

Or even just always allow RST tables to be long since they can't always be shortened?

[sadielbartholomew]

Hi, if this project is still maintained, and nobody is working on this, please could I take this issue on for Hacktoberfest 2021? If so, I can put up a PR shortly and definitely by the end of this week, to ignore .rst tables (in either the 'grid' or 'simple' form) in the maximum line length check. Thanks.