fix minor things and comments

Author: SylvainJuge

instrumentation/opentelemetry-extension-annotations-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/extensionannotations/WithSpanInstrumentation.java

@@ -155,7 +155,7 @@ public Object end(Object returnValue, @Nullable Throwable throwable) {
     @Advice.OnMethodEnter(suppress = Throwable.class)
     public static WithSpanAdviceScope onEnter(@Advice.Origin Method originMethod) {
       // Every usage of @Advice.Origin Method is replaced with a call to Class.getMethod, copy it
-      // to local variable so that there would be only one call to Class.getMethod.
+      // to advice scope so that there would be only one call to Class.getMethod.
       return WithSpanAdviceScope.start(originMethod);
     }
 
@@ -217,7 +217,7 @@ public static WithSpanAttributesAdviceScope onEnter(
         @Advice.Origin Method originMethod,
         @Advice.AllArguments(typing = Assigner.Typing.DYNAMIC) Object[] args) {
       // Every usage of @Advice.Origin Method is replaced with a call to Class.getMethod, copy it
-      // to local variable so that there would be only one call to Class.getMethod.
+      // to advice scope so that there would be only one call to Class.getMethod.
       MethodRequest request = new MethodRequest(originMethod, args);
       return WithSpanAttributesAdviceScope.start(originMethod, request);
     }

instrumentation/opentelemetry-instrumentation-annotations-1.16/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/instrumentationannotations/WithSpanInstrumentation.java

@@ -87,7 +87,7 @@ public static class WithSpanAdviceScope {
       private final Context context;
       private final Scope scope;
 
-      public WithSpanAdviceScope(Method method, Context context, Scope scope) {
+      private WithSpanAdviceScope(Method method, Context context, Scope scope) {
         this.method = method;
         this.context = context;
         this.scope = scope;