clarified: convert only non-string header values to string

jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
index 688aa77..9873f40 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/client/ClientRequestContext.java
@@ -180,7 +180,7 @@
     /**
      * Get a message header as a single string value.
      *
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
@@ -196,7 +196,7 @@
     /**
      * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
      *
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *

jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
index 2a7f46f..70fe218 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/container/ContainerResponseContext.java
@@ -102,7 +102,7 @@
     /**
      * Get a message header as a single string value.
      *
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
@@ -118,7 +118,7 @@
     /**
      * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
      *
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *

jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java

diff --git a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
index 8cd8e10..782afb5 100644
--- a/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
+++ b/jaxrs-api/src/main/java/jakarta/ws/rs/core/HttpHeaders.java
@@ -48,7 +48,7 @@
      * <p>
      * Get a HTTP header as a single string value.
      * </p>
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *
@@ -64,7 +64,7 @@
     /**
      * Checks whether a header with a specific name and value (or item of the comma-separated value list) exists.
      *
-     * Each single header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
+     * Each single non-string header value is converted to String using a {@link jakarta.ws.rs.ext.RuntimeDelegate.HeaderDelegate} if one
      * is available via {@link jakarta.ws.rs.ext.RuntimeDelegate#createHeaderDelegate(java.lang.Class)} for the header value
      * class or using its {@code toString} method if a header delegate is not available.
      *