Merge pull request #209 from Hearen/typo-fix-in-prompts

fix some typos in error prompts

core/src/main/java/com/taobao/arthas/core/command/klass100/RedefineCommand.java

@@ -64,12 +64,12 @@ public class RedefineCommand extends AnnotatedCommand {
         for (String path : paths) {
             File file = new File(path);
             if (!file.exists()) {
-                process.write("path is not exists, path:" + path + "\n");
+                process.write("file does not exist, path:" + path + "\n");
                 process.end();
                 return;
             }
             if (!file.isFile()) {
-                process.write("path is not a normal file, path:" + path + "\n");
+                process.write("not a normal file, path:" + path + "\n");
                 process.end();
                 return;
             }