fix code style issue

Author: a-tarasyuk

src/compiler/checker.ts

@@ -15893,7 +15893,8 @@ namespace ts {
                 if (isReadonlySymbol(localOrExportSymbol)) {
                     if (isConstVariable(localOrExportSymbol)) {
                         error(node, Diagnostics.Cannot_assign_to_0_because_it_is_a_constant, symbolToString(symbol));
-                    } else {
+                    }
+                    else {
                         error(node, Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(symbol));
                     }
                     return errorType;