Fix markdown formatting (rome#46)

* Fix markdown formatting

* remove remaining dollar signs from bash commands

.github/CODE_OF_CONDUCT.md

@@ -68,9 +68,9 @@ members of the project's leadership.
 ## Attribution
 
 This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+available at <https://www.contributor-covenant.org/version/1/4/code-of-conduct.html>
 
 [homepage]: https://www.contributor-covenant.org
 
 For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq
+<https://www.contributor-covenant.org/faq>

.github/CONTRIBUTING.md

@@ -8,10 +8,10 @@ Our [Discord server](https://discord.gg/9WxHa5d) is open for help and more adhoc
 
 Getting started with developing Rome is as easy as three commands. You will need Node v12 or above.
 
-```
-$ git clone https://github.com/facebookexperimental/rome
-$ cd rome
-$ scripts/dev-rome --help
+```bash
+git clone https://github.com/facebookexperimental/rome
+cd rome
+scripts/dev-rome --help
 ```
 
 No dependency installation step is required as we check in our `node_modules` folder that contains only a copy of TypeScript and some definitions.
@@ -22,8 +22,8 @@ Refer to [Getting Started](../docs/getting-started.md) for more usage documentat
 
 You can run the test suite with the following command:
 
-```
-$ scripts/dev-rome test
+```bash
+scripts/dev-rome test
 ```
 
 This will run all tests inside of any `__rtests__` directories.
@@ -32,6 +32,6 @@ This will run all tests inside of any `__rtests__` directories.
 
 Run TypeScript with code emitting disabled to perform a full typecheck outside the editor.
 
-```
-$ node_modules/.bin/tsc --noEmit
+```bash
+node_modules/.bin/tsc --noEmit
 ```