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

Also improves the markdown in that section.

Markdown renderers find it easier to determine
where lists start and end when lists are surrounded
by new lines.

For consistency, also ensure entries in the list
are aligned when they span multipls lines.

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.

- Also makes other minor Markdown fixes that were near the main fixes.

Also corrects capitalisation of Git.

[ci skip]