[docs] Minor changes to the Prerequisites page. (#55)
[docs] Minor changes to the Prerequisites page. (#55)

* [docs] Minor changes to the Prerequisites page.

* Remove redundant empty lines, be consistent that there is no space between a header and regular text after it

* Address review comments.

google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz