.r" or ".Rmd"
extension will be checked for code duplication.</p></dd>


<dt>min_block_size</dt>
<dd><p><code>dupree</code> uses a notion of non-trivial
symbols.  These are the symbols / code-words that remain after filtering
out really common symbols like <code>&lt;-</code>, <code>,</code>, etc. After filtering
out these symbols from each code-block, only those blocks containing at
least <code>min_block_size</code> symbols are used in the inter-block
code-duplication measurement.</p></dd>


<dt>filter</dt>