debugger docs

Fixes #1767

doc/api/debugger.markdown

@@ -6,16 +6,13 @@ Node has a built-in client for this debugger. To use this, start Node with the
 `debug` argument; a prompt will appear:
 
     % node debug myscript.js
-    debug>
-
-At this point `myscript.js` is not yet running. To start the script, enter
-the command `run`. If everything works okay, the output should look like
-this:
-
-    % node debug myscript.js
-    debug> run
-    debugger listening on port 5858
+    < debugger listening on port 5858
     connecting... ok
+    break in /home/indutny/Code/git/indutny/myscript.js:1
+      1 x = 5;
+      2 setTimeout(function () {
+      3   debugger;
+    debug>
 
 Node's debugger client doesn't support the full range of commands, but
 simple step and inspection is possible. By putting the statement `debugger;`
@@ -33,35 +30,49 @@ For example, suppose `myscript.js` looked like this:
 
 Then once the debugger is run, it will break on line 4.
 
-    % ./node debug myscript.js
-    debug> run
-    debugger listening on port 5858
+    % node debug myscript.js
+    < debugger listening on port 5858
     connecting... ok
-    hello
-    break in #<an Object>._onTimeout(), myscript.js:4
-      debugger;
-      ^
+    break in /home/indutny/Code/git/indutny/myscript.js:1
+      1 x = 5;
+      2 setTimeout(function () {
+      3   debugger;
+    debug> cont
+    < hello
+    break in /home/indutny/Code/git/indutny/myscript.js:3
+      1 x = 5;
+      2 setTimeout(function () {
+      3   debugger;
+      4   console.log("world");
+      5 }, 1000);
     debug> next
-    break in #<an Object>._onTimeout(), myscript.js:5
-      console.log("world");
-      ^
-    debug> print x
+    break in /home/indutny/Code/git/indutny/myscript.js:4
+      2 setTimeout(function () {
+      3   debugger;
+      4   console.log("world");
+      5 }, 1000);
+      6 console.log("hello");
+    debug> repl
+    Press Ctrl + C to leave debug repl
+    > x
     5
-    debug> print 2+2
+    > 2+2
     4
     debug> next
-    world
-    break in #<an Object>._onTimeout() returning undefined, myscript.js:6
-    }, 1000);
-    ^
+    < world
+    break in /home/indutny/Code/git/indutny/myscript.js:5
+      3   debugger;
+      4   console.log("world");
+      5 }, 1000);
+      6 console.log("hello");
+      7
     debug> quit
-    A debugging session is active. Quit anyway? (y or n) y
     %
 
 
-The `print` command allows you to evaluate variables. The `next` command steps
-over to the next line. There are a few other commands available and more to
-come type `help` to see others.
+The `repl` command allows you to evaluate code remotely. The `next` command
+steps over to the next line. There are a few other commands available and more
+to come type `help` to see others.
 
 
 ### Advanced Usage