Thanks Walter, ended up with this:
doc = Nokogiri::HTML.parse(File.new(merge_path))
nodes = doc.xpath("//text()[contains(.,'MERGE')]")
nodes.each do |node|
text = node.text
if md = text.match(/.{2}MERGE(\d+).{2}/)
start_index = text.index(md[0])
start_span_tag = "<span id='merge_#{md[1]}'>"
end_index = start_index + start_span_tag.length + md[0].length
node.content = text.insert(start_index,
start_span_tag).insert(end_index, '</span>')
end
end
Works great.
Wes
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