[css-ruby] Suggestions on block-ruby-005 test

[TalbotG]

http://wpt.live/css/css-ruby/block-ruby-005.html

http://wpt.live/css/css-ruby/block-ruby-005-ref.html

@MatsPalmgren Mats,

Can you replace

html,body {
color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
}

with

body { font:10px/1 monospace; }

Also, can you replace

lines 15 & 19: text-overflow:ellipses;

with

text-overflow:ellipsis;

Also, overflow: hidden is required also in the reference otherwise, text-overflow: ellipsis will not have any rendering effect.

I will create a PR in a few min. to fix all this.