fix typos and comments

Author: SylvainJuge

instrumentation/internal/internal-lambda/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/internal/lambda/LambdaInstrumentationModule.java

@@ -31,7 +31,7 @@ public boolean defaultEnabled(ConfigProperties config) {
   @Override
   public List<String> injectedClassNames() {
     return Collections.singletonList(
-        "io.opentelemetry.javaagent.instrumentation.internal.lambda.LambdaTransformer");
+        "io.opentelemetry.javaagent.instrumentation.internal.lambda.LambdaTransformerHelper");
   }
 
   @Override

instrumentation/internal/internal-lambda/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/internal/lambda/LambdaTransformerHelper.java

@@ -24,7 +24,7 @@ public static byte[] transform(byte[] classBytes, String slashClassName, Class<?
     if (InjectedClassHelper.isHelperClass(targetClass)) {
       return classBytes;
     }
-    LambdaTransformer transformer = LambdaTransformerHolder.setLambdaTransformer();
+    LambdaTransformer transformer = LambdaTransformerHolder.getLambdaTransformer();
     if (transformer == null) {
       return classBytes;
     }

javaagent-bootstrap/src/main/java/io/opentelemetry/javaagent/bootstrap/LambdaTransformerHolder.java

@@ -19,7 +19,7 @@ public final class LambdaTransformerHolder {
    *
    * @return class transformer for defining lambdas
    */
-  public static LambdaTransformer setLambdaTransformer() {
+  public static LambdaTransformer getLambdaTransformer() {
     return lambdaTransformer;
   }
 

javaagent-tooling/javaagent-tooling-java9/src/main/java/io/opentelemetry/javaagent/tooling/Java9LambdaTransformer.java

@@ -22,9 +22,9 @@ public Java9LambdaTransformer(ClassFileTransformer delegate) {
   public byte[] transform(String className, Class<?> targetClass, byte[] classfileBuffer)
       throws IllegalClassFormatException {
 
-    // lambda instrumentation happens only when the lambda is defined, thus the classBeingRedefined
-    // must be null otherwise we get a partial instrumentation, for example virtual fields are not
-    // properly applied
+    // lambda instrumentation happens only when the lambda is being defined, so the targetClass
+    // argument should not be passed to the transformer otherwise we get a partial instrumentation,
+    // for example virtual fields are not properly applied
     return delegate.transform(
         targetClass.getModule(),
         targetClass.getClassLoader(),

javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/Java8LambdaTransformer.java

@@ -22,9 +22,9 @@ public Java8LambdaTransformer(ClassFileTransformer delegate) {
   public byte[] transform(String className, Class<?> targetClass, byte[] classfileBuffer)
       throws IllegalClassFormatException {
 
-    // lambda instrumentation happens only when the lambda is defined, thus the classBeingRedefined
-    // must be null otherwise we get a partial instrumentation, for example virtual fields are not
-    // properly applied.
+    // lambda instrumentation happens only when the lambda is being defined, so the targetClass
+    // argument should not be passed to the transformer otherwise we get a partial instrumentation,
+    // for example virtual fields are not properly applied
     return delegate.transform(targetClass.getClassLoader(), className, null, null, classfileBuffer);
   }
 }