Move lastLine setter into conditional block to prevent .commands and blank lines from setting lastLine

lib/coffee-script/repl.js

@@ -115,8 +115,8 @@
     repl.rli.addListener('line', function(code) {
       if (code && code.length && code !== '.history' && lastLine !== code) {
         fs.write(fd, "" + code + "\n");
+        return lastLine = code;
       }
-      return lastLine = code;
     });
     process.on('exit', function() {
       return fs.closeSync(fd);

src/repl.coffee

@@ -106,7 +106,7 @@ addHistory = (repl, filename, maxSize) ->
     if code and code.length and code isnt '.history' and lastLine isnt code
       # Save the latest command in the file
       fs.write fd, "#{code}\n"
-    lastLine = code
+      lastLine = code
 
   process.on 'exit', ->
     fs.closeSync fd