Fix bug in which argument parsing was not correctly done

src/main/kotlin/com/vandenbreemen/ktt/view/plugins/MacrosPlugin.kt

@@ -15,7 +15,7 @@ class MacrosPlugin(private val macroRegistry: MacroRegistry): PageRenderingPlugi
 
             val argMap: MutableMap<String, String> = mutableMapOf()
             if(macro.groupValues[2].isNotEmpty()) {
-                val argumentsRaw = macro.groupValues[2].split("[\\s]*[,][\\s]*")
+                val argumentsRaw = macro.groupValues[2].split("[\\s]*[,][\\s]*".toRegex())
                 argumentsRaw.mapNotNull { argument ->
                     argument.split("=").let { rawPair ->
                         if(rawPair.size != 2) {

src/test/kotlin/com/vandenbreemen/ktt/view/plugins/MacrosPluginTest.kt

@@ -14,6 +14,10 @@ class MacrosPluginTest {
 
         override fun execute(args: Map<String, String>): String {
             val message = args["message"] ?: "(missing message)"
+            val additional = args["additional"]
+            if(additional != null) {
+                return "got pair:  ${Pair<String, String>(message, additional).toString()}"
+            }
             return "HiMsg:  $message"
         }
     }
@@ -80,4 +84,22 @@ This is a special test.
         rendered.shouldContain("HiMsg:  (missing message)")
     }
 
+    @Test
+    fun `should handle macros with multiple arguments`() {
+        val markdown = """
+# Hello world
+
+this is a test of some wiki content.
+
+{@macro:HelloWorld message=Hi how are you?, additional=this/is/a/test}
+
+This is a special test.
+        """.trimIndent()
+
+        val rendered = plugin.process(markdown)
+
+        println("RENDERED:\n===================\n$rendered")
+        rendered.shouldContain("got pair:  (Hi how are you?, this/is/a/test)")
+    }
+
 }