Added underline extension fnction.

src/main/kotlin/net/thauvin/erik/mobibot/Utils.kt

@@ -335,6 +335,13 @@ object Utils {
     @JvmStatic
     fun LocalDateTime.toUtcDateTime(): String = format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm"))
 
+    /**
+     * Makes the given string bold.
+     */
+    @JvmStatic
+    fun String?.underline(): String = colorize(Colors.UNDERLINE)
+
+
     /**
      * Converts XML/XHTML entities to plain text.
      */

src/test/kotlin/net/thauvin/erik/mobibot/UtilsTest.kt

@@ -57,6 +57,7 @@ import net.thauvin.erik.mobibot.Utils.toIntOrDefault
 import net.thauvin.erik.mobibot.Utils.toIsoLocalDate
 import net.thauvin.erik.mobibot.Utils.toUtcDateTime
 import net.thauvin.erik.mobibot.Utils.today
+import net.thauvin.erik.mobibot.Utils.underline
 import net.thauvin.erik.mobibot.Utils.unescapeXml
 import net.thauvin.erik.mobibot.msg.Message.Companion.DEFAULT_COLOR
 import org.pircbotx.Colors
@@ -251,6 +252,11 @@ class UtilsTest {
         assertThat("a".toIntOrDefault(2), "toIntOrDefault(a, 2)").isEqualTo(2)
     }
 
+    @Test
+    fun testUnderline() {
+        assertThat(ascii.underline()).isEqualTo(ascii.colorize(Colors.UNDERLINE))
+    }
+
     @Test
     fun testUnescapeXml() {
         assertThat("<a name="test & ''">".unescapeXml()).isEqualTo(