beta should not have newlines

schemas/README.md

@@ -33,6 +33,7 @@ Optional field set attributes:
 - reusable (optional): Used to identify which field sets are expected to be reused in multiple places.
   See "Field set reuse" for details.
 - beta: Adds a beta marker for the entire fieldset. The text provided in this attribute is used as content of the beta marker in the documentation.
+  Beta should not have newlines.
 
 ### Field set reuse
 
@@ -106,15 +107,15 @@ The above defines all process fields in both places:
 ```
 
 The `beta` marker can optionally be used along with `at` and `as` to include a beta marker in the field reuses section, marking specific reuse locations as beta.
+Beta should not have newlines.
 
 ```
   reusable:
     top_level: true
     expected:
     - at: user
       as: target
-      beta: >
-        Reusing these fields in this location is currently considered beta.
+      beta: Reusing these fields in this location is currently considered beta.
 ```
 
 ### List of fields
@@ -146,7 +147,7 @@ Supported keys to describe fields
 - format: Field format that can be used in a Kibana index template.
 - normalize: Normalization steps that should be applied at ingestion time. Supported values:
   - array: the content of the field should be an array (even when there's only one value).
-- beta (optional): Adds a beta marker for the field to the description. The text provided in this attribute is used as content of the beta marker in the documentation. Note that when a whole field set is marked as beta, it is not necessary nor recommended to mark all fields in the field set as beta.
+- beta (optional): Adds a beta marker for the field to the description. The text provided in this attribute is used as content of the beta marker in the documentation. Note that when a whole field set is marked as beta, it is not necessary nor recommended to mark all fields in the field set as beta. Beta should not have newlines.
 
 Supported keys to describe expected values for a field