Clean up issues that may cause the docs-lint
test to fail, such as trailing whitespace, no
EOF newline, blockquotes, etc

Deletes extra spaces and line, makes lists consistent, and
fixes links.

Many code blocks are 4spaced, and they render in GitLab
without coloring as a result, even though they are
fenced with a language label. If in a list, other items
will render as being in a code block too, even if not
meant to. This fixes all these issues, and cleans up
minor white space issues in /topic, /university, /update
and /workflow docs.

Correct the spacing of unordered markdown lists
in docs, to maintain standards of documentation.

All code blocks should be surrounded by blank lines

Update the installation link

See merge request gitlab-org/gitlab-ce!30489

Updating redirected links in the development, install, policy
raketasks and university dirs. Should now link to final
URL to avoid redirect hops

The installation link has changed from /installation/ to /install/. This
commit will update all the remaining links that are missing.