From f4740e9e050273414f6a82833d0dfe890f6f82c8 Mon Sep 17 00:00:00 2001
From: Kirill Rakhman <kirill.rakhman@jetbrains.com>
Date: Thu, 21 Dec 2023 15:00:26 +0100
Subject: [PATCH] [FIR] Improve ASSIGNMENT_OPERATOR_SHOULD_RETURN_UNIT message

---
 .../kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
index 6b1498be367..921cf9cfc6e 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
@@ -2374,7 +2374,7 @@ object FirErrorsDefaultMessages : BaseDiagnosticRendererFactory() {
         map.put(INC_DEC_SHOULD_NOT_RETURN_UNIT, "Functions 'inc()', 'dec()' shouldn't return 'Unit' to be used by operators ++, --.")
         map.put(
             ASSIGNMENT_OPERATOR_SHOULD_RETURN_UNIT,
-            "Function ''{0}'' should return ''Unit'' to be used by corresponding operator ''{1}''.",
+            "Function ''{0}'' must return ''Unit'' to be used by corresponding operator ''{1}''.",
             SYMBOL,
             TO_STRING
         )