spell_check_package() now checks vignettes/pkgdown subfolder

[kbenoit]

In the quanteda package we have some non-English language vignettes but only in the vignettes/pkgdown folder. Previously (last week??), spell_check_package() did not check those files, but now it does, so we get a very long list of Chinese, Japanese, Spanish etc words that fail to match the English dictionary or WORDLIST.

Does not fail on Travis by the way, only locally.

Is there a way to exclude this subfolder from checking?

[maelle]

Due to 099f146

[kbenoit]

would be nice to be able to disable this