Add https://blog.racket-lang.org/2012/06/submodules.html as an example for in-source documentation

I couldn't locate gif.rkt in the `file' collection. See a complete working example was helpful to get started. I think it will be as useful for
other Racketeers .(especially beginners like myself).

If gif.rkt is indeed gone due to refactorings, I guess the reference to it should removed.
This commit is contained in:
Ilnar Salimzianov 2019-03-25 13:56:21 +03:00 committed by Ben Greenman
parent 4a88753757
commit 7e2bce57ad

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@ -26,7 +26,9 @@ same way that the module system keeps expansion-time code separate
from run-time code, and documentation information is recorded in a
submodule to be separately loadable from the enclosing module.
For an example use, see the @filepath{file} collection's
For an example use, see
@hyperlink["https://blog.racket-lang.org/2012/06/submodules.html"]{this}
post at @tt{blog.racket-lang.org} or the @filepath{file} collection's
@filepath{gif.rkt} source file and the corresponding extraction in
@filepath{scribblings/gif.scrbl}. As that example illustrates,
starting the module declaration with