Tidy filename Rd display from roxy_field_backref

[LiNk-NY]

When multiple files are referenced in one documentation page, they will run off the page.

This will create a one line per file format for the .Rd display. Example below:

cat(sprintf("%% Please edit in:\n%% %s\n",
      paste(c("a", "b", "c"), collapse = ",\n% ")))

[codecov-io]

Current coverage is 83.13% (diff: 100%)

No coverage report found for master at 7133fd6.

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[hadley]

I'd rather just wrap to (say) 80 characters

[LiNk-NY]

That works too

[hadley]

Do you want to have a go at implementing that?

[LiNk-NY]

Yes, should have it soon..

[LiNk-NY]

I didn't find an easy way to add "\n" to the output of strwrap. I ended up using paste twice. https://github.com/LiNk-NY/roxygen/blob/master/R/rd-tag-api.R#L97

[LiNk-NY]

Looks ready to go unless you have a more elegant way of adding "\n" to the end of a stri_wrap return

[hadley]

Thanks!