placeholder variables (#21377)

Author: ranbel

src/content/docs/style-guide/api-content-strategy/guidelines-for-curl-commands.mdx

@@ -15,7 +15,7 @@ To automatically incorporate our conventions into your examples, use:
 - [`APIRequest`](/style-guide/components/api-request/): For examples hitting endpoints in the Cloudflare API schema.
 - [`CURL`](/style-guide/components/curl/): For other cURL commands.
 
-## Paramter names
+## Parameter names
 
 Use long parameter names for clarity:
 
@@ -45,7 +45,7 @@ If you must suggest the use of this tool, you can add a link to the [Make API ca
 
 * Make sure not to use typographical or smart quotes in a cURL command, or the command will fail.
 * Placeholders in the URL should follow the same format as in the API documentation: `$ZONE_ID`
-* Placeholders in the request body (that is, the data included in a `POST`/`PUT`/`PATCH` request) should use this format: `<RULE_ID>`
+* Placeholders in the request body (that is, the data included in a `POST`/`PUT`/`PATCH` request) should use [angle brackets](/style-guide/formatting/code-conventions-and-format/#angle-brackets---and--): `<RULE_ID>`
 
 The same placeholder name should correspond to the same value – use different placeholder names for different ID values. You can use the same request placeholders in the response, if they should match the values in the request.
 

src/content/docs/style-guide/formatting/code-conventions-and-format.mdx

@@ -8,18 +8,20 @@ Use the conventions described below throughout Cloudflare product content.
 
 ## Angle brackets ( `<` and `>` )
 
-Use angle brackets as a placeholder for variables you want the user to enter (except in URLs, where you should use curly braces for placeholders).
+Use angle brackets to denote placeholders for variables you want the user to enter (except in [API URLs and API authentication headers](/style-guide/api-content-strategy/guidelines-for-curl-commands/#request-guidelines), where you should use the `$ZONE_ID` / `$CLOUDFLARE_API_TOKEN` format). Placeholder text should have all capital letters and use underscores (`_`) to separate words.
 
-Example:
-
-Type your user-specified domain in this format: `https://<user-specified domain>.cloudflare.com`
+Examples:
 
 ```
 {
   "description": "<RULE_DESCRIPTION>"
 }
 ```
 
+```
+https://<YOUR_DOMAIN>.cloudflare.com
+```
+
 Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or single name - for example, AO `<0...3>`.
 
 ## Square brackets ( `[` and `]` )
@@ -32,13 +34,7 @@ Specify a subsearch that starts with this search command: `tag=dns query [search
 
 ## Curly braces ( `{` and `}` )
 
-Use curly braces in the following situations, such as:
-
-When they are part of a code sample or other string literal, such as in placeholders inside a URL.
-
-Example:
-
-`https://api.cloudflare.com/client/v4/organizations/{organization_identifier}/invites`
+Do not use curly braces for URL or variable placeholders. Instead, refer to [angle brackets](#angle-brackets---and--).
 
 ## >