Add test case for #20.

src/test/kotlin/cc/ekblad/toml/bugs/BugRegressionTests.kt

@@ -0,0 +1,30 @@
+package cc.ekblad.toml.parser
+
+import cc.ekblad.toml.StringTest
+import cc.ekblad.toml.model.TomlValue
+import cc.ekblad.toml.serialization.from
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class BugRegressionTests : StringTest {
+    @Test
+    fun `issue 20`() {
+        // https://github.com/valderman/4koma/issues/20
+        val actual = TomlValue.from(
+            """
+            [messages]
+            joinMessage = "<green>[+] %playerName%"
+            leaveMessage = "<red>[-] %playerName%"
+            chatFormat = "%displayName% : %message%"
+            """.trimIndent()
+        )
+        val expected = TomlValue.Map(
+            "messages" to TomlValue.Map(
+                "joinMessage" to TomlValue.String("<green>[+] %playerName%"),
+                "leaveMessage" to TomlValue.String("<red>[-] %playerName%"),
+                "chatFormat" to TomlValue.String("%displayName% : %message%"),
+            ),
+        )
+        assertEquals(expected, actual)
+    }
+}