convert anonym class to onle-line lambda if possible (IDEA-90820)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/afterComparable.java

@@ -1,8 +1,6 @@
 // "Replace with lambda" "true"
 class Test {
   {
-    Comparable<String> c = o -> {
-        return 0;
-    }; 
+    Comparable<String> c = o -> 0; 
   }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/afterFormalTypes.java

@@ -9,8 +9,6 @@ class Test2 {
     static <T> I<T> bar(I<T> i){return i;}
  
     {
-        bar((List<String> list) -> {
-            return null;  //To change body of implemented methods use File | Settings | File Templates.
-        });
+        bar((List<String> list) -> null);
     }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/afterMultilineComparable.java

@@ -0,0 +1,9 @@
+// "Replace with lambda" "true"
+class Test {
+  {
+    Comparable<String> c = o -> {
+        System.out.println();
+        return 0;
+    }; 
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/anonymous2lambda/beforeMultilineComparable.java

@@ -0,0 +1,12 @@
+// "Replace with lambda" "true"
+class Test {
+  {
+    Comparable<String> c = new Compa<caret>rable<String>() {
+      @Override
+      public int compareTo(String o) {
+        System.out.println();
+        return 0;
+      }
+    }; 
+  }
+}