Apply suggestions from code review

Co-authored-by: Andrew Rouse <[email protected]>

Author: benjamin-confino

api/src/main/java/org/eclipse/microprofile/openapi/annotations/servers/ServerVariable.java

@@ -53,7 +53,7 @@
     /**
      * The default value of this server variable. This is a REQUIRED property.
      * <p>
-     * If enumeration is set the default value MUST be one of the values in enumeration.
+     * If {@code enumeration} is set the default value MUST be one of the values in {@code enumeration}.
      *
      * @return the default value of this server variable
      **/

api/src/main/java/org/eclipse/microprofile/openapi/models/servers/ServerVariable.java

@@ -105,7 +105,7 @@ default ServerVariable enumeration(List<String> enumeration) {
      * The default value to use for substitution, and to send, if an alternate value is not supplied. This value MUST be
      * provided by the consumer and is REQUIRED.
      * <p>
-     * If enumeration is set the default value MUST be one of the values in enumeration.
+     * If {@code enumeration} is set the default value MUST be one of the values in {@code enumeration}.
      * <p>
      * This method sets the defaultValue property of ServerVariable instance to the given defaultValue argument.
      * </p>
@@ -119,7 +119,7 @@ default ServerVariable enumeration(List<String> enumeration) {
      * The default value to use for substitution, and to send, if an alternate value is not supplied. This value MUST be
      * provided by the consumer and is REQUIRED.
      * <p>
-     * If enumeration is set the default value MUST be one of the values in enumeration.
+     * If {@code enumeration} is set the default value MUST be one of the values in {@code enumeration}.
      * <p>
      * This method sets the defaultValue property of ServerVariable instance to the given defaultValue argument and
      * returns the modified instance.