Code quality improvements

0.15.3 (2019-04-16)

Fix

• reduced overview added odd extra space in front of a new line when new lines used (blank line in the middle of overview)
• changelog:info did not work correctly when used on ROOT package
• certain templates did not render wrapper elements correctly (issue introduced after switching to new, 5.3-compatible output generator)

Maintenance

• code repetition reduced within command classes

Links: src diff