Fix case of zero iteration count

Kevin Ellis · birtles · commit 89c54adec41a · 2021-06-24T09:09:42.000+09:00
diff --git a/web-animations-2/Overview.bs b/web-animations-2/Overview.bs
@@ -1006,11 +1006,16 @@ Add:
 > ::  Follow the procedure in
 >     [[#the-intrinsic-iteration-duration-of-a-sequence-effect]]
 >
-> :   If [=timeline duration=] is unresolved,
+> :   If [=timeline duration=] is unresolved or <a>iteration count</a> is zero,
 > ::  Return 0
 >
 > :   Otherwise
-> ::  Return  [=timeline duration=] / <a>iteration count</a>
+> ::  Return <code>(100% - <a>start delay</a> - <a>end delay</a>) /
+>     <a>iteration count</a></code>
+>     <p class="note">
+>     Presently start and end delays are zero until such time as percentage
+>     based delays are supported.
+>     </p>
 > </div>
 >
 >     The <a>iteration duration</a> of an <a>animation effect</a> may be set

Original file line number	Diff line number	Diff line change
`@@ -1006,11 +1006,16 @@ Add:`
`1006`	`1006`	`> :: Follow the procedure in`
`1007`	`1007`	`> [[#the-intrinsic-iteration-duration-of-a-sequence-effect]]`
`1008`	`1008`	`>`
`1009`		`-> : If [=timeline duration=] is unresolved,`
	`1009`	`+> : If [=timeline duration=] is unresolved or <a>iteration count</a> is zero,`
`1010`	`1010`	`> :: Return 0`
`1011`	`1011`	`>`
`1012`	`1012`	`> : Otherwise`
`1013`		`-> :: Return [=timeline duration=] / <a>iteration count</a>`
	`1013`	`+> :: Return <code>(100% - <a>start delay</a> - <a>end delay</a>) /`
	`1014`	`+> <a>iteration count</a></code>`
	`1015`	`+> <p class="note">`
	`1016`	`+> Presently start and end delays are zero until such time as percentage`
	`1017`	`+> based delays are supported.`
	`1018`	`+> </p>`
`1014`	`1019`	`> </div>`
`1015`	`1020`	`>`
`1016`	`1021`	`> The <a>iteration duration</a> of an <a>animation effect</a> may be set`