Include source of NoSuchMethodError in its failure analysis

Closes gh-15995

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/diagnostics/analyzer/NoSuchMethodFailureAnalyzer.java

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -93,11 +93,19 @@ class NoSuchMethodFailureAnalyzer extends AbstractFailureAnalyzer<NoSuchMethodEr
 			List<URL> candidates, URL actual) {
 		StringWriter description = new StringWriter();
 		PrintWriter writer = new PrintWriter(description);
-		writer.print("An attempt was made to call the method ");
-		writer.print(cause.getMessage());
-		writer.print(" but it does not exist. Its class, ");
-		writer.print(className);
-		writer.println(", is available from the following locations:");
+		writer.println("An attempt was made to call a method that does not"
+				+ " exist. The attempt was made from the following location:");
+		writer.println();
+		writer.print("    ");
+		writer.println(cause.getStackTrace()[0]);
+		writer.println();
+		writer.println("The following method did not exist:");
+		writer.println();
+		writer.print("    ");
+		writer.println(cause.getMessage());
+		writer.println();
+		writer.println("The method's class, " + className
+				+ ", is available from the following locations:");
 		writer.println();
 		for (URL candidate : candidates) {
 			writer.print("    ");

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/NoSuchMethodFailureAnalyzerTests.java

@@ -44,8 +44,11 @@ public class NoSuchMethodFailureAnalyzerTests {
 		assertThat(failure).isNotNull();
 		FailureAnalysis analysis = new NoSuchMethodFailureAnalyzer().analyze(failure);
 		assertThat(analysis).isNotNull();
+		System.out.println(analysis.getDescription());
 		assertThat(analysis.getDescription())
-				.contains("the method javax.servlet.ServletContext.addServlet"
+				.contains(NoSuchMethodFailureAnalyzerTests.class.getName()
+						+ ".createFailure(")
+				.contains("javax.servlet.ServletContext.addServlet"
 						+ "(Ljava/lang/String;Ljavax/servlet/Servlet;)"
 						+ "Ljavax/servlet/ServletRegistration$Dynamic;")
 				.contains("class, javax.servlet.ServletContext,");