Documentation and support for <% foo -%>?

[xpe]

ERB has the whitespace / newline suppression feature, but I have not seen newline suppression of <% foo %> in mentioned in Erubis documentation anywhere. I've also tried it out with no luck. Is this by design?

[cirosantilli]

It's not very clearly documented: after many tests I think this is how it works: http://stackoverflow.com/a/25626629/895245

In particular:

• <% %> only removes the line if the entire line contains only whitespaces
• <%= -%> removes what comes after the tag if there are only whitespaces, regardeless of what comes before.
• - without = makes no difference

[tmccombs]

the absense of -%> support is problematic for me. I have something like:

var = <% if cond -%>
value1
<% elsif cond2 -%>
value2
<% else -%>
value3 that
is complicated and takes multiple lines
<% end -%>