Added exception trapping in main

lib/pom.xml

@@ -23,6 +23,7 @@
       <id>gbevin</id>
       <name>Geert Bevin</name>
       <email>gbevin@uwyn.com</email>
+      <url>https://github.com/gbevin</url>
     </developer>
     <developer>
       <id>ethauvin</id>

lib/src/main/kotlin/net/thauvin/erik/urlencoder/UrlEncoder.kt

@@ -144,7 +144,6 @@ object UrlEncoder {
             ch = source[i]
             if (ch.isUnreserved() || allow.indexOf(ch) != -1) {
                 out?.append(ch)
-                println(out)
                 i++
             } else {
                 if (out == null) {
@@ -192,6 +191,7 @@ object UrlEncoder {
      */
     @JvmStatic
     fun main(args: Array<String>) {
+        try {
             val result = processMain(args)
             if (result.status == 1) {
                 System.err.println(result.output)
@@ -199,6 +199,10 @@ object UrlEncoder {
                 println(result.output)
             }
             exitProcess(result.status)
+        } catch (e: IllegalArgumentException) {
+            System.err.println("${UrlEncoder::class.java.simpleName}: ${e.message}");
+            exitProcess(1)
+        }
     }
 
     internal data class MainResult(var output: String = usage, var status: Int = 1)