[FIR] Fix TEST SPEC tests

Ensure the test data contents for both the frontends
are identical. This is needed for proper analysis of
K2-differences.

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.fir.kt

@@ -1,14 +1,15 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
-class A() {
-    var i = 0
-
-    operator fun dec(): A {
-        this.i--
-        return this
-    }
-}
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-213
+ * MAIN LINK: expressions, prefix-expressions, prefix-decrement-expression -> paragraph 4 -> sentence 1
+ * PRIMARY LINKS: statements, assignments -> paragraph 3 -> sentence 2
+ * NUMBER: 1
+ * DESCRIPTION: check unsafe prefix decrement expression call for an assignable expression
+ */
 
 // TESTCASE NUMBER: 1
 
@@ -22,6 +23,15 @@ class Case1() {
     var a: A = A()
 }
 
+class A() {
+    var i = 0
+
+    operator fun dec(): A {
+        this.i--
+        return this
+    }
+}
+
 // TESTCASE NUMBER: 2
 
 fun case2() {
@@ -30,5 +40,14 @@ fun case2() {
 }
 
 class Case2() {
-    val a = A()
+    val a = A2()
 }
+
+class A2() {
+    var i = 0
+
+    operator fun dec(): A2 {
+        this.i--
+        return this
+    }
+}

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.kt

@@ -11,7 +11,6 @@
  * DESCRIPTION: check unsafe prefix decrement expression call for an assignable expression
  */
 
-
 // TESTCASE NUMBER: 1
 
 fun case1() {

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.fir.kt

@@ -1,37 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// SKIP_TXT
-
-// TESTCASE NUMBER: 1
-
-fun case1() {
-    var a = Case1()
-    val res: Any? = <!RESULT_TYPE_MISMATCH!>++<!>a
-}
-
-
-class Case1() {
-
-    <!INAPPLICABLE_OPERATOR_MODIFIER!>operator<!> fun inc(): B {
-        TODO()
-    }
-}
-
-class B() {}
-
-// TESTCASE NUMBER: 2
-
-fun case2() {
-    var a = Case2()
-    val res: Any? = <!RESULT_TYPE_MISMATCH!>++<!>a
-}
-
-class Case2() : C() {
-    var i = 0
-
-    <!INAPPLICABLE_OPERATOR_MODIFIER!>operator<!> fun inc(): C {
-        TODO()
-    }
-
-}
-
-open class C() {}

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.fir.kt

@@ -1,6 +1,20 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-213
+ * MAIN LINK: expressions, prefix-expressions, prefix-increment-expression -> paragraph 4 -> sentence 1
+ * PRIMARY LINKS: statements, assignments -> paragraph 3 -> sentence 2
+ * NUMBER: 1
+ * DESCRIPTION: check unsafe prefix increment expression call for an assignable expression
+ */
+
+// FILE: TestCase1.kt
+// TESTCASE NUMBER: 1
+package testPackCase1
+
 class A() {
     var i = 0
 
@@ -10,8 +24,6 @@ class A() {
     }
 }
 
-// TESTCASE NUMBER: 1
-
 fun case1() {
     var b: Case1? = Case1()
     ++b?.a
@@ -22,7 +34,18 @@ class Case1() {
     var a: A = A()
 }
 
+// FILE: TestCase2.kt
 // TESTCASE NUMBER: 2
+package testPackCase2
+
+class A() {
+    var i = 0
+
+    operator fun inc(): A {
+        this.i++
+        return this
+    }
+}
 
 fun case2() {
     var b= Case2()

compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.kt

@@ -11,7 +11,6 @@
  * DESCRIPTION: check unsafe prefix increment expression call for an assignable expression
  */
 
-
 // FILE: TestCase1.kt
 // TESTCASE NUMBER: 1
 package testPackCase1
@@ -55,4 +54,4 @@ fun case2() {
 
 class Case2() {
     val a = A()
-}
+}