[Typo] Fix redundant newline

Redundant newline cause redundant white space on deployment.

'There is also the ThreadPo ol module which is quite similar.'

Removed redundant escape sequence to make 'ThreadPo ol` to 'ThreadPool'.

Author: hwanseok-dev

ipython/ParallelProgramming.ipynb

@@ -151,8 +151,7 @@
       "example. [This\n",
       "recipe](http://code.activestate.com/recipes/576519/)\n",
       "provides a thread Pool() interface with the same API as that found for\n",
-      "processes (below) which might also be of interest. There is also the [ThreadPo\n",
-      "ol](http://www.chrisarndt.de/projects/threadpool/)\n",
+      "processes (below) which might also be of interest. There is also the [ThreadPool](http://www.chrisarndt.de/projects/threadpool/)\n",
       "module which is quite similar.\n",
       "\n",
       "#### Processes\n",