Add some spaces in docs for cosmetics and readability reasons.

[silvin-lubecki]

[thaJeztah]

LGTM, thanks!

[thaJeztah]

Hm... keep running into these timing out; not sure what changed; perhaps it was always just on the edge of 10 minutes, and now slightly over?

Successfully tagged cli-builder-with-git:23114
time make -B vendor
make[1]: Entering directory '/go/src/github.com/docker/cli'
rm -rf vendor
bash -c 'vndr |& grep -v -i clone'
2019/03/18 11:38:26 Collecting initial packages
Too long with no output (exceeded 10m0s)

[thaJeztah]

Opened #1750 to reduce flakiness

[codecov-io]

Codecov Report

Merging #1748 into master will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@## master #1748 +/- ##
======================================
Coverage 56.1% 56.1% ======================================
Files 306 306 Lines 21049 21049 ======================================
Hits 11810 11810 Misses 8382 8382 Partials 857 857