title: Error in normalizePath(path.expand(path), winslash, mustWork) with pdf_search package?
body: <p>I never had this issue with any other package , however I am running 2  very basic lines and i am getting error even though i used :</p>
  <pre><code>library(pdftools)
  library(pdfsearch)
  
  file &lt;- system.file('pdf', 'finance.pdf', package = 'pdfsearch')
  
  keyword_search(file, keyword = c('loan', 'interest'),
                 path = TRUE)
  </code></pre>
  <p>Getting this error :</p>
  <pre><code>Error in normalizePath(path.expand(path), winslash, mustWork) : 
    path[1]=&quot;&quot;: The filename, directory name, or volume label syntax is incorrect
  </code></pre>
  <p>Earlier used .libPaths and changed my working directories but nothing seem to work for me.What could be the reason as I looking into other questions related to this to solve and tried it but no avail ?</p>