Prepare for benchmarking and profiling.

tool/src/main/kotlin/gay/pizza/pork/tool/AttributeCommand.kt

@@ -16,7 +16,7 @@ class AttributeCommand : CliktCommand(help = "Attribute AST", name = "attribute"
 
     val coalescer = NodeCoalescer { node ->
       val tokens = attribution.assembleTokens(node)
-      println("node ${node.toString().replace("\n", "^")}")
+      println("node ${node.type.name}")
       for (token in tokens) {
         println("token $token")
       }

tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt

@@ -2,14 +2,27 @@ package gay.pizza.pork.tool
 
 import com.github.ajalt.clikt.core.CliktCommand
 import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.options.flag
+import com.github.ajalt.clikt.parameters.options.option
 import com.github.ajalt.clikt.parameters.types.path
 import gay.pizza.pork.evaluator.CallableFunction
 import gay.pizza.pork.evaluator.Scope
 
 class RunCommand : CliktCommand(help = "Run Program", name = "run") {
+  val loop by option("--loop", help = "Loop Program").flag()
   val path by argument("file").path(mustExist = true, canBeDir = false)
 
   override fun run() {
+    if (loop) {
+      while (true) {
+        runProgramOnce()
+      }
+    } else {
+      runProgramOnce()
+    }
+  }
+
+  private fun runProgramOnce() {
     val tool = FileTool(path)
     val scope = Scope()
     scope.define("println", CallableFunction { arguments ->