More markdown fixes: github editor considered harmful

Signed-off-by: regularfry <[email protected]>

README.md

@@ -43,14 +43,14 @@ cd nhs-england-tools/repository-template
 
 The following software packages or their equivalents are expected to be installed
 
-- [GNU make](https://www.gnu.org/software/make/) **v3.82 or later: OS X users, take note below** 
+- [GNU make](https://www.gnu.org/software/make/) **v3.82 or later: OS X users, take note below**
 - [Docker](https://www.docker.com/)
 
 Note that the version of GNU Make available by default on OS X is earlier than this.  You will need to upgrade it, or certain `make` tasks will fail.  On OS X, you will need [homebrew](https://brew.sh/) installed, then to install `make`, like so:
 
-```
-$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
-$ brew install make
+```shell
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+brew install make
 ```
 
 You will then see instructions to fix your `$PATH` variable to make the newly installed version available.
@@ -111,4 +111,3 @@ Provide a way to contact the owners of this project. It can be a team, an indivi
 Unless stated otherwise, the codebase is released under the MIT License. This covers both the codebase and any sample code in the documentation.
 
 Any HTML or Markdown documentation is [© Crown Copyright](https://www.nationalarchives.gov.uk/information-management/re-using-public-sector-information/uk-government-licensing-framework/crown-copyright/) and available under the terms of the [Open Government Licence v3.0](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
-