[x/tour] content: add a link to previous exercise in methods/25
Added a link to methods/25 to moretypes/18 because they are related.
This improves the usability of the page.
Fixes golang/tour#95
Change-Id: I3ec7e85267d0e5da9c67194dce58d5310eefc97b
GitHub-Last-Rev: 1fe64640097e65af0ddbd058b908f765a9aaf7da
GitHub-Pull-Request: golang/tour#471
Reviewed-on: https://go-review.googlesource.com/110118
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
X-Tour-Commit: 03133cc9684f0d84f4b533c0b064683d8822e587
diff --git a/tour/content/methods.article b/tour/content/methods.article
index 7475369..5ad5cc8 100644
--- a/tour/content/methods.article
+++ b/tour/content/methods.article
@@ -403,7 +403,7 @@
* Exercise: Images
-Remember the picture generator you wrote earlier? Let's write another one, but this time it will return an implementation of `image.Image` instead of a slice of data.
+Remember the [[/moretypes/18][picture generator]] you wrote earlier? Let's write another one, but this time it will return an implementation of `image.Image` instead of a slice of data.
Define your own `Image` type, implement [[https://golang.org/pkg/image/#Image][the necessary methods]], and call `pic.ShowImage`.
