Fix typos related to indefinite articles

Closes gh-23555

spring-webmvc/src/main/java/org/springframework/web/servlet/HandlerInterceptor.java

@@ -81,7 +81,7 @@ public interface HandlerInterceptor {
 	 * <p>DispatcherServlet processes a handler in an execution chain, consisting
 	 * of any number of interceptors, with the handler itself at the end.
 	 * With this method, each interceptor can decide to abort the execution chain,
-	 * typically sending a HTTP error or writing a custom response.
+	 * typically sending an HTTP error or writing a custom response.
 	 * <p><strong>Note:</strong> special considerations apply for asynchronous
 	 * request processing. For more details see
 	 * {@link org.springframework.web.servlet.AsyncHandlerInterceptor}.

spring-webmvc/src/main/java/org/springframework/web/servlet/function/RequestPredicates.java

@@ -347,7 +347,7 @@ public abstract class RequestPredicates {
 		void pathExtension(String extension);
 
 		/**
-		 * Receive notification of a HTTP header predicate.
+		 * Receive notification of an HTTP header predicate.
 		 * @param name the name of the HTTP header to check
 		 * @param value the desired value of the HTTP header
 		 * @see RequestPredicates#headers(Predicate)

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.java

@@ -401,7 +401,7 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
 
 	/**
 	 * Handle the case where a {@linkplain org.springframework.http.converter.HttpMessageConverter message converter}
-	 * cannot read from a HTTP request.
+	 * cannot read from an HTTP request.
 	 * <p>The default implementation sends an HTTP 400 error, and returns an empty {@code ModelAndView}.
 	 * Alternatively, a fallback view could be chosen, or the HttpMessageNotReadableException could be
 	 * rethrown as-is.
@@ -422,7 +422,7 @@ public class DefaultHandlerExceptionResolver extends AbstractHandlerExceptionRes
 	/**
 	 * Handle the case where a
 	 * {@linkplain org.springframework.http.converter.HttpMessageConverter message converter}
-	 * cannot write to a HTTP request.
+	 * cannot write to an HTTP request.
 	 * <p>The default implementation sends an HTTP 500 error, and returns an empty {@code ModelAndView}.
 	 * Alternatively, a fallback view could be chosen, or the HttpMessageNotWritableException could
 	 * be rethrown as-is.

spring-webmvc/src/main/java/org/springframework/web/servlet/support/ServletUriComponentsBuilder.java

@@ -70,7 +70,7 @@ public class ServletUriComponentsBuilder extends UriComponentsBuilder {
 	}
 
 
-	// Factory methods based on a HttpServletRequest
+	// Factory methods based on an HttpServletRequest
 
 	/**
 	 * Prepare a builder from the host, port, scheme, and context path of the

spring-webmvc/src/main/java/org/springframework/web/servlet/view/RedirectView.java

@@ -55,7 +55,7 @@ import org.springframework.web.util.WebUtils;
  * but this behavior can be changed by overriding the
  * {@link #isEligibleProperty(String, Object)} method.
  *
- * <p>A URL for this view is supposed to be a HTTP redirect URL, i.e.
+ * <p>A URL for this view is supposed to be an HTTP redirect URL, i.e.
  * suitable for HttpServletResponse's {@code sendRedirect} method, which
  * is what actually does the redirect if the HTTP 1.0 flag is on, or via sending
  * back an HTTP 303 code - if the HTTP 1.0 compatibility flag is off.

spring-webmvc/src/main/java/org/springframework/web/servlet/view/ResourceBundleViewResolver.java

@@ -147,7 +147,7 @@ public class ResourceBundleViewResolver extends AbstractCachingViewResolver
 	 * <p>This avoids repeated "yyy1.(parent)=xxx", "yyy2.(parent)=xxx" definitions
 	 * in the bundle, especially if all defined views share the same parent.
 	 * <p>The parent will typically define the view class and common attributes.
-	 * Concrete views might simply consist of an URL definition then:
+	 * Concrete views might simply consist of a URL definition then:
 	 * a la "yyy1.url=/my.jsp", "yyy2.url=/your.jsp".
 	 * <p>View definitions that define their own parent or carry their own
 	 * class can still override this. Strictly speaking, the rule that a