That doesn't work when alignment depends on the tab size like aligning an indented line below an unindented line like long assignments Type myvar = somethi

That doesn't work when alignment depends on the tab size like aligning an indented line below an unindented line like long assignments Type myvar = something_very_long + that_needs_alignment; The only way to guarantee such complex alignment is using spaces. It renders everywhere exactly the same. So reviewing stuff on web-based environments gets easier.