[FIR] Remove links to spec sentences during comparison fir and old front-end test data

compiler/tests-common/tests/org/jetbrains/kotlin/checkers/BaseDiagnosticsTest.kt

@@ -412,6 +412,7 @@ abstract class BaseDiagnosticsTest : KotlinMultiFileTestWithJava<TestModule, Tes
         val RENDER_DIAGNOSTICS_FULL_TEXT = "RENDER_DIAGNOSTICS_FULL_TEXT"
 
         val DIAGNOSTIC_IN_TESTDATA_PATTERN = Regex("<!>|<!(.*?(\\(\".*?\"\\)|\\(\\))??)+(?<!<)!>")
+        val SPEC_LINKS_IN_TESTDATA_PATTERN = Regex("""/\*\s+\*\s+RELEVANT SPEC SENTENCES[\w\W]*?\*/\n""")
 
         fun parseDiagnosticFilterDirective(
             directiveMap: Directives,

compiler/tests-common/tests/org/jetbrains/kotlin/fir/FirTestUtils.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.fir
 import com.intellij.openapi.util.text.StringUtil
 import junit.framework.TestCase
 import org.jetbrains.kotlin.checkers.BaseDiagnosticsTest.Companion.DIAGNOSTIC_IN_TESTDATA_PATTERN
+import org.jetbrains.kotlin.checkers.BaseDiagnosticsTest.Companion.SPEC_LINKS_IN_TESTDATA_PATTERN
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.jetbrains.kotlin.test.util.trimTrailingWhitespacesAndAddNewlineAtEOF
 import java.io.File
@@ -51,6 +52,8 @@ fun compareAndMergeFirFileAndOldFrontendFile(
 }
 
 fun loadTestDataWithoutDiagnostics(file: File): String {
-    val textWithoutDiagnostics = KotlinTestUtils.doLoadFile(file).replace(DIAGNOSTIC_IN_TESTDATA_PATTERN, "")
+    val textWithoutDiagnostics = KotlinTestUtils.doLoadFile(file)
+        .replace(DIAGNOSTIC_IN_TESTDATA_PATTERN, "")
+        .replace(SPEC_LINKS_IN_TESTDATA_PATTERN, "")
     return StringUtil.convertLineSeparators(textWithoutDiagnostics.trim()).trimTrailingWhitespacesAndAddNewlineAtEOF()
 }