Fix ringbuffer tests for newline

tests/test_ringbuffer.cpp

@@ -15,9 +15,10 @@ TEST_CASE("ringbuffer stores formatted messages", "[ringbuffer]") {
 
     auto formatted = sink.last_formatted();
     REQUIRE(formatted.size() == 3);
-    REQUIRE(formatted[0] == "msg1");
-    REQUIRE(formatted[1] == "msg2");
-    REQUIRE(formatted[2] == "msg3");
+    using spdlog::details::os::default_eol;
+    REQUIRE(formatted[0] == spdlog::fmt_lib::format("msg1{}", default_eol));
+    REQUIRE(formatted[1] == spdlog::fmt_lib::format("msg2{}", default_eol));
+    REQUIRE(formatted[2] == spdlog::fmt_lib::format("msg3{}", default_eol));
 }
 
 TEST_CASE("ringbuffer overrun keeps last items", "[ringbuffer]") {
@@ -30,8 +31,9 @@ TEST_CASE("ringbuffer overrun keeps last items", "[ringbuffer]") {
 
     auto formatted = sink.last_formatted();
     REQUIRE(formatted.size() == 2);
-    REQUIRE(formatted[0] == "second");
-    REQUIRE(formatted[1] == "third");
+    using spdlog::details::os::default_eol;
+    REQUIRE(formatted[0] == spdlog::fmt_lib::format("second{}", default_eol));
+    REQUIRE(formatted[1] == spdlog::fmt_lib::format("third{}", default_eol));
 }
 
 TEST_CASE("ringbuffer retrieval limit", "[ringbuffer]") {
@@ -44,7 +46,8 @@ TEST_CASE("ringbuffer retrieval limit", "[ringbuffer]") {
 
     auto formatted = sink.last_formatted(2);
     REQUIRE(formatted.size() == 2);
-    REQUIRE(formatted[0] == "B");
-    REQUIRE(formatted[1] == "C");
+    using spdlog::details::os::default_eol;
+    REQUIRE(formatted[0] == spdlog::fmt_lib::format("B{}", default_eol));
+    REQUIRE(formatted[1] == spdlog::fmt_lib::format("C{}", default_eol));
 }