sphinx checks

Fix issues from sphinx doc-checker

docs/_build/html/_sources/development/getting-started.txt:132: D002 Trailing whitespace
docs/_build/html/_sources/development/getting-started.txt:91: D001 Line too long
docs/_build/html/_sources/development/getting-started.txt:94: D001 Line too long
docs/_build/html/_sources/development/getting-started.txt:108: D001 Line too long
docs/_build/html/_sources/development/getting-started.txt:112: D001 Line too long
docs/development/getting-started.rst:132: D002 Trailing whitespace
docs/development/getting-started.rst:94: D001 Line too long
docs/development/getting-started.rst:112: D001 Line too long