[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/statements/assignments/operator-assignments/p-2/neg/1.1.fir.kt

@@ -1,18 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// SKIP_TXT
-
-class B(var a: Int) {
-    operator fun plus(value: Int): B {
-        a= a + value
-        return this
-    }
-    operator fun plusAssign(value: Int): Unit {
-        a= a + value
-    }
-}
-
-// TESTCASE NUMBER: 1
-fun case1() {
-    var b = B(1)
-    b <!ASSIGN_OPERATOR_AMBIGUITY!>+=<!> 1
-}

compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.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/statements/assignments/p-1/neg/2.1.fir.kt

@@ -1,6 +1,16 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-222
+ * MAIN LINK: statements, assignments -> paragraph 1 -> sentence 2
+ * NUMBER: 1
+ * DESCRIPTION: Both left-hand and right-hand sides of an assignment must be expressions
+ */
+
+
 /*
  * TESTCASE NUMBER: 1
  * NOTE: right-hand side of an assignment must be expression

compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.fir.kt

@@ -1,6 +1,17 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-222
+ * MAIN LINK: statements, assignments -> paragraph 2 -> sentence 1
+ * PRIMARY LINKS: statements, assignments -> paragraph 3 -> sentence 1
+ * statements, assignments, simple-assignments -> paragraph 1 -> sentence 2
+ * NUMBER: 1
+ * DESCRIPTION: Check the expression is not assignable if an identifier referring to an unmutable property
+ */
+
 /*
  * TESTCASE NUMBER: 1
  * NOTE: an identifier referring to a unmutable property

compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.fir.kt

@@ -1,6 +1,18 @@
 // !DIAGNOSTICS: -UNSAFE_CALL -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-222
+ * MAIN LINK: statements, assignments -> paragraph 2 -> sentence 1
+ * PRIMARY LINKS: statements, assignments -> paragraph 3 -> sentence 2
+ * statements, assignments, simple-assignments -> paragraph 1 -> sentence 2
+ * NUMBER: 2
+ * DESCRIPTION: Check the expression is not assignable if a navigation expression referring to an unmutable property
+ */
+
+
 /*
  * TESTCASE NUMBER: 1
  * NOTE: a navigation expression referring to a unmutable property

compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.fir.kt

@@ -1,6 +1,16 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-253
+ * MAIN LINK: statements, loop-statements, do-while-loop-statement -> paragraph 3 -> sentence 1
+ * PRIMARY LINKS: statements, loop-statements, do-while-loop-statement -> paragraph 1 -> sentence 1
+ * NUMBER: 1
+ * DESCRIPTION: condition expression is not a subtype of kotlin.Boolean.
+ */
+
 // TESTCASE NUMBER: 1
 fun case1() {
     do {

compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.fir.kt

@@ -1,6 +1,17 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-253
+ * MAIN LINK: statements, loop-statements, while-loop-statement -> paragraph 3 -> sentence 1
+ * PRIMARY LINKS: statements, loop-statements, while-loop-statement -> paragraph 1 -> sentence 1
+ * NUMBER: 1
+ * DESCRIPTION: condition expression is not a subtype of kotlin.Boolean.
+ * HELPERS: checkType
+ */
+
 // FILE: KotlinClass.kt
 // TESTCASE NUMBER: 1
 fun case1() {