docs(api): tidy up the reference prose (#2628)

fluxer_docs/src/content/docs/http-api/channels.mdx

@@ -189,7 +189,7 @@ The slowmode state combines the channel's configured interval with the authentic
 
 ## RTC region object
 
-An RTC region names one voice routing target the deployment operates. Its identifier is the value a guild voice channel stores in `rtc_region`, and the name and emoji exist only for presentation.
+An RTC region names one voice routing target the deployment operates. Its identifier is the value a guild voice channel stores in `rtc_region`, and the name and emoji exist only for display.
 
 ### Structure
 
@@ -217,8 +217,7 @@ Returns the [channel object](#channel-object) visible to the authenticated user.
 
 ### Limitations
 
-- A guild channel requires [VIEW_CHANNEL](/http-api/permissions/).
-- A guild channel that resolves to an age restriction also requires a satisfied age verification.
+- A guild channel requires [VIEW_CHANNEL](/http-api/permissions/), and a satisfied age verification when it resolves to an age restriction.
 - A private channel requires current recipient access.
 - The personal notes channel requires ownership.
 
@@ -241,12 +240,12 @@ Fluxer enforces age verification only for a guild text, voice, or link channel.
 | 404 | [error response](/http-api/#error-response) | Channel does not exist, or the caller is not a recipient of the private channel, each returning `UNKNOWN_CHANNEL`, or the guild that owns the channel does not exist and the request returns `UNKNOWN_GUILD` |
 
 :::note[The guild resolves after the channel]
-A channel whose guild is gone fails with `UNKNOWN_GUILD` rather than `UNKNOWN_CHANNEL`.
+A channel whose guild is gone fails with `UNKNOWN_GUILD`, not `UNKNOWN_CHANNEL`.
 :::
 
 ### Side effects
 
-Requesting the personal notes channel of the authenticated user creates that channel when it does not already exist, and returns it directly without a [Channel Create](/gateway/events/#channel-create) Dispatch.
+Requesting the personal notes channel of the authenticated user creates it when it does not already exist, and returns it with no [Channel Create](/gateway/events/#channel-create) Dispatch.
 
 ### Rate limit
 
@@ -276,7 +275,7 @@ Returns the authenticated user's [channel slowmode state object](#channel-slowmo
 
 ### Side effects
 
-The read does not advance the caller's slowmode countdown. Requesting the personal notes channel of the authenticated user creates that channel when it does not already exist, with no [Channel Create](/gateway/events/#channel-create) Dispatch.
+The read does not advance the caller's slowmode countdown. Requesting the personal notes channel of the authenticated user creates it when it does not already exist, with no [Channel Create](/gateway/events/#channel-create) Dispatch.
 
 ### Rate limit
 
@@ -341,7 +340,7 @@ Modifies a guild channel or a group direct message and returns the updated [chan
 The submitted array becomes the complete overwrite collection of the channel.
 :::
 
-[Set channel permission overwrite](#set-channel-permission-overwrite) and [Delete channel permission overwrite](#delete-channel-permission-overwrite) each mutate one overwrite and leave the rest untouched.
+[Set channel permission overwrite](#set-channel-permission-overwrite) and [Delete channel permission overwrite](#delete-channel-permission-overwrite) each change one overwrite and leave the rest untouched.
 
 ### Path parameters
 
@@ -454,7 +453,7 @@ Fluxer trims a stored nickname, and a value that is null or empty after trimming
 
 ### Side effects
 
-A guild channel change emits [Channel Update](/gateway/events/#channel-update) to every session subscribed to the guild. Replacing a category's permission overwrites also replaces them on each child whose overwrites still exactly match the category's previous values, with one Dispatch per changed child. A child whose overwrites had diverged is left unchanged.
+A guild channel change emits [Channel Update](/gateway/events/#channel-update) to every session subscribed to its guild. Replacing a category's permission overwrites also replaces them on each child whose overwrites still exactly match the category's previous values, with one Dispatch per changed child. A child whose overwrites had differed is left unchanged.
 
 Changing `rate_limit_per_user` clears the channel's current slowmode state so the new interval applies immediately. Changing `rtc_region` on a guild voice channel moves its active voice connections to the selected region.
 
@@ -470,7 +469,7 @@ A group direct message change emits [Channel Update](/gateway/events/#channel-up
 
 <RouteHeader method="DELETE" path="/v1/channels/{channel_id}" bot />
 
-Deletes a guild channel, closes a direct message, or removes the caller from a group direct message, and returns 204 with an empty body. Emits a [Channel Delete](/gateway/events/#channel-delete) Gateway event.
+Deletes a guild channel, closes a direct message, or removes the caller from a group direct message. Returns 204 with an empty body. Emits a [Channel Delete](/gateway/events/#channel-delete) Gateway event.
 
 ### Limitations
 
@@ -569,16 +568,15 @@ Adds a user to a group direct message and returns 204 with an empty body. Emits
 
 ### Limitations
 
-- The caller must be a current recipient of the group.
-- The caller and the target must be friends, including when the caller is a bot.
+- The caller must be a current recipient of the group, and must be friends with the target, including when the caller is a bot.
 - The target's group direct message admission policy must allow the caller.
 - An instance with CAPTCHA enabled also requires a CAPTCHA proof.
 
 Fluxer evaluates the target's admission policy in this order.
 
 1. A target that has never stored settings admits every caller.
-2. A nobody setting rejects every caller. An everyone setting admits every caller.
-3. A friends-only setting admits only a caller the target has as a friend.
+2. The nobody setting rejects every caller, and the everyone setting admits every caller.
+3. The friends-only setting admits only a caller the target has as a friend.
 4. Otherwise Fluxer admits the caller through an existing friendship, then through a mutual friend when the friends-of-friends setting is enabled, and then through a mutual guild when the guild-members setting is enabled.
 
 ### Path parameters
@@ -610,7 +608,7 @@ Fluxer evaluates the target's admission policy in this order.
 | 403 | [error response](/http-api/#error-response) | Caller is not a recipient, or the target's admission policy rejects the caller, each returning `MISSING_ACCESS` |
 | 404 | [error response](/http-api/#error-response) | Channel does not exist and the request returns `UNKNOWN_CHANNEL` |
 
-The `MAX_GROUP_DM_RECIPIENTS` body has `max_recipients` reporting the exact ceiling that was reached. That ceiling is the deployment's [`max_group_dm_recipients`](/http-api/instance/#limit-keys) limit resolved for the caller, and it defaults to 50.
+The `MAX_GROUP_DM_RECIPIENTS` body has `max_recipients`, the exact ceiling that was reached. That ceiling is the deployment's [`max_group_dm_recipients`](/http-api/instance/#limit-keys) limit resolved for the caller, and it defaults to 50.
 
 ### Side effects
 
@@ -629,7 +627,7 @@ Removes a user from a group direct message and returns 204 with an empty body. E
 ### Limitations
 
 - The caller must be a current recipient.
-- A caller may remove themself regardless of ownership.
+- A caller may remove themselves regardless of ownership.
 - Removing another recipient requires ownership of the group.
 - Setting `delete_messages` takes effect only when `user_id` is the caller, and it then requires sudo verification on the same terms as [Delete or leave channel](#delete-or-leave-channel).
 
@@ -696,7 +694,7 @@ Creates or replaces one permission overwrite on a guild channel and returns 204
 
 The operation does not require `VIEW_CHANNEL` and never returns `TWO_FACTOR_REQUIRED` or `NSFW_CONTENT_AGE_RESTRICTED`.
 
-:::note[The identifier alone keys the overwrite]
+:::note[The identifier alone selects the overwrite]
 `type` records whether the identifier names a role or a member, and does not change which entry is written. An overwrite can be stored for an identifier that names nothing, and [Delete channel permission overwrite](#delete-channel-permission-overwrite) removes it.
 :::
 
@@ -757,7 +755,7 @@ Deletes one permission overwrite from a guild channel and returns 204 with an em
 
 - A caller without [ADMINISTRATOR](/http-api/permissions/) must already hold every permission bit the removed overwrite denied.
 
-The operation is idempotent. It does not require `VIEW_CHANNEL` and never returns `TWO_FACTOR_REQUIRED` or `NSFW_CONTENT_AGE_RESTRICTED`.
+The operation is idempotent, does not require `VIEW_CHANNEL`, and never returns `TWO_FACTOR_REQUIRED` or `NSFW_CONTENT_AGE_RESTRICTED`.
 
 ### Path parameters
 
@@ -766,7 +764,7 @@ The operation is idempotent. It does not require `VIEW_CHANNEL` and never return
 | channel_id | snowflake | The ID of the guild channel |
 | overwrite_id<sup>1</sup> | snowflake | The ID of the role or member the overwrite represents |
 
-<sup>1</sup> The identifier alone selects the overwrite. The request has no overwrite type
+<sup>1</sup> The identifier alone selects the overwrite, and the request has no overwrite type
 
 ### Response