# File lib/math_ml/element.rb, line 187 def set_align_attribute(name, a, default) if a.is_a?(Array) && a.size>0 value = "" a.each do |i| value << " "+i end if value =~ /^( #{default})*$/ @attributes.delete(name) else @attributes[name] = value.strip end else @attributes.delete(name) end end