Accept HTML produced from #lang scribble/base

[khinsen]

A minor convience for those who, like me, have the habit of using #lang scribble/base for writing future HTML.

[greghendershott]

This looks good. I'd merge, but I'm frustrated (not with you!) about the 5.3.x build jobs failing on Travis:

$ raco pkg install --deps search-auto --link frog
The following packages are listed as dependencies, but are not currently installed,
so they will be automatically installed:
    base html-lib racket-index scribble-lib srfi-lite-lib web-server-lib markdown rackjure find-parent-dir 
package-url->checksum: Could not connect to GitHub
  context...:
   /home/travis/racket/collects/pkg/util.rkt:50:0: package-url->checksum11
   /home/travis/racket/collects/pkg/lib.rkt:459:2: install-package228
   /home/travis/racket/collects/pkg/lib.rkt:459:2: install-package228
   /home/travis/racket/collects/pkg/lib.rkt:981:4: for-loop
   /home/travis/racket/collects/pkg/lib.rkt:449:0: install-packages55
   /home/travis/racket/collects/racket/file.rkt:295:8
   /home/travis/racket/collects/racket/file.rkt:284:0: call-with-file-lock24
   /home/travis/racket/collects/pkg/main.rkt: [running body]
   /home/travis/racket/collects/pkg/raco.rkt: [traversing imports]
   /home/travis/racket/collects/raco/raco.rkt: [running body]
   /home/travis/racket/collects/raco/main.rkt: [running body]

I've seen that happen rarely; restarting the job always fixes it.

But I've restarted it a couple times and it's still failing there.

Is Racket 5.3.x using the GitHub API in a slightly wrong way, that no longer works? Unfortunately I'm time-limited to chase this down today. If you can figure out more, great, otherwise I'll try to tackle it later.

(We could just drop support for Racket 5.3.5 and 5.3.6. But aside from today's glitch, there's no reason not to keep supporting them.)

[greghendershott]

From #racket and looking at code I determined it's failing b/c Racket 5.3.x doesn't supply creds to the GitHub API, and that API is rate-limited.

I did eventually get a restart of the Racket 5.3.5 job to pass. Although not yet 5.3.6, from what the code changes I think it's fine.

So: Merged. Thanks!

[greghendershott]

FWIW I logged the general issue: greghendershott/travis-racket#9