Add link to article about writing an FS in Rust

Author: carlosgaldino

draft/2020-07-28-this-week-in-rust.md

@@ -18,6 +18,8 @@ Check out [this week's *This Week in Rust Podcast*](https://rustacean-station.or
 
 ## News & Blog Posts
 
+* [Writing a file system from scratch in Rust](https://blog.carlosgaldino.com/writing-a-file-system-from-scratch-in-rust.html)
+
 # Crate of the Week
 
 This week's crate is [pre](https://github.com/aticu/pre), a library for declaring and checking the assurance of precondition, useful for unsafe functions.
@@ -109,7 +111,7 @@ decision. Express your opinions now.
 # Upcoming Events
 
 ### Online
-* [July 23. Berlin, DE - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/txcprrybckbfc/) 
+* [July 23. Berlin, DE - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/txcprrybckbfc/)
 * [July 27 - August 2. Rusty Days Virtual Rust Conference](https://rusty-days.org/)
 
 ### North America