block-collapsible assumption under wrong heading (#2285)

Author: WilcoFiers

_rules/block-collapsible-3e12e1.md

@@ -39,16 +39,14 @@ For each [block of repeated content][] in each test target, which is before (in
 
 ### Assumptions
 
-There are no assumptions.
+Usually the same [instrument][] removes both [visibility][visible] and [inclusion in the accessibility tree][included in the accessibility tree] of a [block of repeated content][]. That [instrument][] may remove all [blocks of repeated content][block of repeated content]. If there is no [block of repeated content][] before the non-repeated content the rule passes.
+
+[Technique SCR28: Using an expandable and collapsible menu to bypass block of content][tech scr28] does not have any requirements concerning the location of the [instruments][instrument] in relation to the [block of repeated content][] they control, hence this rule doesn't. It is likely a good idea to either keep each [instrument][] close to the start of the [block of repeated content][] it controls; or to group them all in one place near the start of the document. Notably, [instruments][instrument] located after (in reading order) the block they collapse are likely not satisfying [Success Criterion 2.4.1 Bypass blocks][sc241], which this rule is designed for. Thus, it is possible to pass this rule without satisfying [Success Criterion 2.4.1 Bypass blocks][sc241].
 
 ### Accessibility Support
 
 There are no accessibility support issues known.
 
-Usually the same [instrument][] removes both [visibility][visible] and [inclusion in the accessibility tree][included in the accessibility tree] of a [block of repeated content][]. That [instrument][] may remove all [blocks of repeated content][block of repeated content]. If there is no [block of repeated content][] before the non-repeated content the rule passes.
-
-[Technique SCR28: Using an expandable and collapsible menu to bypass block of content][tech scr28] does not have any requirements concerning the location of the [instruments][instrument] in relation to the [block of repeated content][] they control, hence this rule doesn't. It is likely a good idea to either keep each [instrument][] close to the start of the [block of repeated content][] it controls; or to group them all in one place near the start of the document. Notably, [instruments][instrument] located after (in reading order) the block they collapse are likely not satisfying [Success Criterion 2.4.1 Bypass blocks][sc241], which this rule is designed for. Thus, it is possible to pass this rule without satisfying [Success Criterion 2.4.1 Bypass blocks][sc241].
-
 ### Bibliography
 
 - [Technique SCR28: Using an expandable and collapsible menu to bypass block of content][tech scr28]