[Tests] Trim contents before checking for FIR_IDENTICAL

compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType.fir.kt

@@ -1,17 +0,0 @@
-
-fun foo(a: String, b: Int = 5): String {
-    return a + b
-}
-
-fun bar1(body: (String) -> String): String {
-    return body("something")
-}
-
-fun bar2(body: (String, Int) -> String): String {
-    return body("something", 0)
-}
-
-fun test() {
-    bar1(::foo)
-    bar2(::foo)
-}

compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 fun foo(a: String, b: Int = 5): String {
     return a + b
 }