It all comes down to a trade off.
Do you want you view or your final output to be legible and
aesthetically pleasing according to some subjective human standard?.
Don't get me wrong, I dislike the empty lines as much as you do but as
Massimo said the view only outputs what it has:
this view
<ul>{{for x in range(1,r+1):}}<li>{{if x==c:}}<b>{{=x}}</b>{{else:}}
{{=x}}</li>{{pass}}{{pass}}</ul>
could produce this
<ul><li>1</li><li>2</li><li><b>3</b></li><li>4</li><li>5</li></ul>
but a more legible
<ul>
{{for x in range(1,r+1):}}<li>
{{if x==c:}}<b>{{=x}}</b>
{{else:}}{{=x}}
</li>
{{pass}}
{{pass}}
</ul>
will give you this
<ul>
<li>
1
</li>
<li>
2
</li>
<li>
<b>3</b>
</li><li>
4
</li>
<li>
5
</li>
</ul>
and both outputs would look exactly the same in a browser.
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