RFR: Add tabfiles to jcheck configuration [v3]

[Erik Joelsson]

On Tue, 3 Nov 2020 11:09:28 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> The tabfiles setting is just like the files setting, but it lists files in which tabs are allowed.
>> 
>> (This is to support makefiles)
>
> Magnus Ihse Bursie has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename "tabfiles" to "ignore-tabs"

Marked as reviewed by erikj (Reviewer).

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PR: https://git.openjdk.java.net/skara/pull/929