Passing a block to gsub

# Simple example
# Regex is between these -> \\ and my replacement string is in single quotes

def change_p_tags_to_divs(content)
  content.gsub(\<.*?(p)>\, 'div')
end


# Complex example
# This (real) example puts `@tags` in a hyperlink, finds a path (if any) and then spits out the result. 

def highlight_at_tags(content)
  content.gsub(/@(\w+)/m) do |w|
    ws = Workspace.find_by_name("#{$1}")
    %{<a class="at_tag" href="\"><span class="at_symbol">@</span><span>#{$1}</span></a>}
  end
end