Clarify room version grammar (#1422)

Apparently the SHOULD is confusing
2 years ago · a7790fcbbf
parent 05620913d5
commit a7790fcbbf
2 changed files with 2 additions and 1 deletions
--- a/changelogs/room_versions/newsfragments/1422.clarification
+++ b/changelogs/room_versions/newsfragments/1422.clarification
@ -0,0 +1 @@
+Clarify the grammar for room versions.
--- a/content/rooms/_index.md
+++ b/content/rooms/_index.md
@ -86,7 +86,7 @@ split-brain situation due to not understanding the new rules.

 A room version is defined as a string of characters which MUST NOT
 exceed 32 codepoints in length. Room versions MUST NOT be empty and
-SHOULD contain only the characters `a-z`, `0-9`, `.`, and `-`.
+MUST contain only the characters `a-z`, `0-9`, `.`, and `-`.

 Room versions are not intended to be parsed and should be treated as
 opaque identifiers. Room versions consisting only of the characters