testing ruby

def foo
  puts 'foo'
end

testing python

for nice in this:
    print "how interesting"

testing latex

\[ 
\sum_{n=1}^\infty \frac{1}{n} 
\text{ is divergent, but } 
\lim_{n \to \infty} \sum_{i=1}^n \frac{1}{i} - \ln n \text{exists.} 
\]

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