[Website] Edits to Python string blog post

Change-Id: I4208e6d42fc6040313de7a01f897fc22db490c43

site/_posts/2019-02-05-python-string-memory-0.12.md

@@ -130,10 +130,10 @@ values.
 
 ## Memory and Performance Benchmarks
 
-We can use the `memory_profiler` Python package to easily get process memory
-usage within a running Python application.
+We can use the [`memory_profiler`][2] Python package to easily get process
+memory usage within a running Python application.
 
-```
+```python
 import memory_profiler
 def mem():
     return memory_profiler.memory_usage()[0]
@@ -243,4 +243,5 @@ native memory layout of pandas or other analytics tools. We will do our best to
 provide fast and memory-efficient interoperability with pandas and other
 popular libraries.
 
-[1]: https://www.slideshare.net/xhochy/extending-pandas-using-apache-arrow-and-numba
+[1]: https://www.slideshare.net/xhochy/extending-pandas-using-apache-arrow-and-numba
+[2]: https://pypi.org/project/memory-profiler/