doc fix: missing link target in pipers-pie introduction (#754)

glennj · web-flow · commit 706060cfea0b · 2025-06-17T14:17:51.000+08:00
diff --git a/concepts/tail-call-recursion/introduction.md b/concepts/tail-call-recursion/introduction.md
@@ -45,3 +45,4 @@ This would not be possible for a function with the type signature `Int -> Int`,
 
 [recursion-tc]: https://en.wikipedia.org/wiki/Tail_call
 [call-stack]: https://en.wikipedia.org/wiki/Call_stack
+[tail-call-optimization]: https://jfmengels.net/tail-call-optimization/
diff --git a/exercises/concept/pipers-pie/.docs/introduction.md b/exercises/concept/pipers-pie/.docs/introduction.md
@@ -47,3 +47,4 @@ This would not be possible for a function with the type signature `Int -> Int`,
 
 [recursion-tc]: https://en.wikipedia.org/wiki/Tail_call
 [call-stack]: https://en.wikipedia.org/wiki/Call_stack
+[tail-call-optimization]: https://jfmengels.net/tail-call-optimization/

Original file line number	Diff line number	Diff line change
@@ -45,3 +45,4 @@ This would not be possible for a function with the type signature `Int -> Int`,
`45`	`45`
`46`	`46`	`[recursion-tc]: https://en.wikipedia.org/wiki/Tail_call`
`47`	`47`	`[call-stack]: https://en.wikipedia.org/wiki/Call_stack`
	`48`	`+[tail-call-optimization]: https://jfmengels.net/tail-call-optimization/`
Original file line number	Diff line number	Diff line change
@@ -47,3 +47,4 @@ This would not be possible for a function with the type signature `Int -> Int`,
`47`	`47`
`48`	`48`	`[recursion-tc]: https://en.wikipedia.org/wiki/Tail_call`
`49`	`49`	`[call-stack]: https://en.wikipedia.org/wiki/Call_stack`
	`50`	`+[tail-call-optimization]: https://jfmengels.net/tail-call-optimization/`