Java inspection: In "Join Declaration and Assignment" intention action warn about side effects of the initializer being removed (IDEA-157727)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/joinDeclaration/afterSideEffect.java

@@ -0,0 +1,11 @@
+// "Join declaration and assignment" "true"
+class T {
+    {
+        foo(1);
+        int a = foo(2);
+    }
+    static int foo(int n) {
+        System.out.println(n);
+        return n + 1;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/joinDeclaration/beforeSideEffect.java

@@ -0,0 +1,11 @@
+// "Join declaration and assignment" "true"
+class T {
+    {
+        int a =<caret> foo(1);
+        a = foo(2);
+    }
+    static int foo(int n) {
+        System.out.println(n);
+        return n + 1;
+    }
+}