title: "ERROR: syntax: cannot juxtapose string literal" when ending a triple-quoted string literal with a quote
body: <p>I'm trying to create a string literal representing a CSV file with quoted fields. The intended CSV looks like this:</p>
  
  <pre><code>"a","b"
  "1","2"
  </code></pre>
  
  <p>Triple quotes work if I want a newline character at the end of the string:</p>
  
  <pre><code>julia&gt; """
         "a","b"
         "1","2"
         """
  "\"a\",\"b\"\n\"1\",\"2\"\n"
  </code></pre>
  
  <p>But if I try to make a string without the newline character at the end, then I get a syntax error:</p>
  
  <pre><code>julia&gt; """
         "a","b"
         "1","2""""
  ERROR: syntax: cannot juxtapose string literal
  </code></pre>
  
  <p>Is there a simple way to get around this?</p>
  
  <p>As an aside, note that there is no syntax error when you start the string-literal with a quote:</p>
  
  <pre><code>julia&gt; """"a","b"
         "1","2"
         """
  "\"a\",\"b\"\n\"1\",\"2\"\n"
  </code></pre>