Fix prerequisites doc page for content is partly occluded by navigator

Signed-off-by: Ethan Li <lir2002@gmail.com>

docs/source/prereqs.md

@@ -4,9 +4,6 @@ The following prerequisites are required to run a Docker-based Fabric test netwo
 
 ## Mac
 
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-<div style="margin-left: 1.5em;">
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 ### Homebrew
 
 For macOS, we recommend using [Homebrew](https://brew.sh) to manage the prereqs.
@@ -89,13 +86,9 @@ Optional: Install the latest version of [jq](https://stedolan.github.io/jq/downl
 brew install jq
 jq --version # => jq-1.6
 ```
-</div>
 
 ## **Linux (Ubuntu/Debian based distro)**
 
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-<div style="margin-left: 1.5em;">
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 Prerequisites: [git](https://git-scm.com/downloads), [cURL](https://curl.haxx.se/download.html), [Docker](https://docs.docker.com/get-docker/)
 
 ```shell
@@ -123,13 +116,8 @@ Optional: Install the latest version of [Go](https://golang.org/doc/install) (on
 
 Optional: Install the latest version of [jq](https://stedolan.github.io/jq/download/) (only required for the tutorials related to channel configuration transactions).
 
-</div>
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 ## **Windows**
 
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-<div style="margin-left: 1.5em;">
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 ### Docker
 
 Install the latest version of [Docker Desktop](https://docs.docker.com/get-docker/) if it is not already installed.
@@ -166,8 +154,6 @@ git config --get core.longpaths
 ```
 These output from these commands should be false and true respectively.
 
-</div>
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 ## **Notes**
 
 - These prerequisites are recommended for Fabric users. If you are a Fabric developer, please refer to the instructions for [Setting up the development environment](https://hyperledger-fabric.readthedocs.io/en/latest/dev-setup/devenv.html).