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Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

changelogs/server_server/newsfragments/1099.clarification

@@ -1 +1 @@
-Clarifies the historical handling of non-integer power levels.
+Clarify the historical handling of non-integer power levels.

content/rooms/fragments/v1-stringy-power-levels.md

@@ -2,7 +2,7 @@
 toc_hide: true
 ---
 
-##### Power levels accepted as strings
+##### `m.room.power_levels` events accept values as strings
 
 In order to maintain backwards compatibility with early implementations,
 power levels can optionally be represented in string format instead of
@@ -10,7 +10,7 @@ integer format. A homeserver must be prepared to deal with this by parsing
 the power level from a string. In these cases, the following formatting of the
 power level string is allowed:
 
-* a single Base10 integer, no float values or decimal points, optionally with
+* a single base 10 integer, no float values or decimal points, optionally with
   any number of leading zeroes (`"100"`, `"000100"`);
 * optionally with any number of leading or trailing whitespace characters (`" 100 "`,
   `" 00100 "`);
@@ -19,6 +19,6 @@ power level string is allowed:
   `"-100"`).
 
 {{% boxes/note %}}
-The integer represented by the string must still be within the `[-2^53, 2^53)`
+The integer represented by the string must still be within the `[-(2**53)+1, (2**53)-1]`
 range accepted by normal, non-string, power level values.
 {{% /boxes/note %}}

content/rooms/v10.md

@@ -41,12 +41,12 @@ use cases should reference.
 {{% /boxes/warning %}}
 
 [Room version 7](/rooms/v7) added "knocking" and [room version 8](/rooms/v8)
-added "join restrictions" (refined by [room version 9](/rooms/v9)) - both allow
+added "join restrictions" (refined by [room version 9](/rooms/v9)) — both allow
-prospective members an avenue to join, however both could not be used at the
+prospective members an avenue to join, however it was not possible to use
-same time due to how the join rules work. This room version adds a new
+the two mechanisms together. This room version adds a new
 `knock_restricted` join rule as a mix of the two behaviours, allowing a user to
 join the room if they meet either the `restricted` join rule criteria or the
-`knock` join rule criteria - whichever function they're attempting to use.
+`knock` join rule criteria.
 
 This room version additionally requires that values in the power levels event
 be integers and not string representations, unlike other room versions.
@@ -63,7 +63,7 @@ for details on the current event format.
 While this room version does not change the event format specifically, some
 deprecated behaviours are strictly no longer supported.
 
-##### Power levels must be integers
+##### Values in `m.room.power_levels` events must be integers
 
 In other room versions, such as [v9](/rooms/v9/#power-levels-accepted-as-strings),
 power levels could be represented as strings for backwards compatibility.

content/rooms/v9.md

@@ -17,7 +17,7 @@ Clients which implement the redaction algorithm locally should refer to the
 
 ### Redactions
 
-{{% added-in this=true %}} `m.room.member` now keep `join_authorised_via_users_server`
+{{% added-in this=true %}} `m.room.member` events now keep `join_authorised_via_users_server`
 in addition to other keys in `content` when being redacted.
 
 {{% rver-fragment name="v9-redactions" %}}