linting

intro/README.md

@@ -2,4 +2,4 @@
 
 1. [What is Docker?](what-is-docker/README.md)
 2. [Play with Docker](play-with-docker/README.md)
-3. [Why does Docker exist?](why-docker/README.md)
+3. [Why does Docker exist?](why-docker/README.md)

intro/play-with-docker/README.md

@@ -1,3 +1,3 @@
 # Play with Docker
 
-> A quick way to start a container before we get into the details.
+> A quick way to start a container before we get into the details.

intro/what-is-docker/README.md

@@ -52,10 +52,10 @@ so for now, let’s briefly give you the basics, starting with the container ima
 
 Now we’re gonna get into way more detail on those three things throughout this course.
 
-Now that you know a bit about those three Docker innovations, you should understand *why* docker needed to exist, and what problems it solves. 
+Now that you know a bit about those three Docker innovations, you should understand *why* docker needed to exist, and what problems it solves.
 
 That’s next!
 
 Further reading:
 
-- [A Brief History of Containers: From the 1970s till now](https://blog.aquasec.com/a-brief-history-of-containers-from-1970s-chroot-to-docker-2016)
+- [A Brief History of Containers: From the 1970s till now](https://blog.aquasec.com/a-brief-history-of-containers-from-1970s-chroot-to-docker-2016)

intro/why-docker/README.md

@@ -1,2 +1 @@
 # Why does Docker exist?
-