title: How to add double quotes to after a certain position in a string in R
body: <p>I have a data.table with many rows that look like this in R:</p>
  <pre><code>    V1        V2       V3    V4   V5  V6  V7  V8   V9           V10
   NCBINCC    GenBank   gene  331 1008  .   -   .   gene_id=UL1   protein_id=ABV71500.1
   NCBINCC    GenBank   gene  1009 1120  .  -   .  gene_id=UL4   protein_id=ABV71520
   NCBINCC    GenBank   gene  1135 1200  .  -   .  gene_id=UL6   protein_id=ABV71525
  </code></pre>
  <p>Is there a simple way to add quotes in between strings (after the strings gene_id= and protein_id=) so that they only encompass the different gene and proteins like the following output:</p>
  <pre><code>    V1        V2       V3    V4   V5  V6  V7  V8   V9            V10
   NCBINCC    GenBank   gene  331 1008  .   -   .   gene_id=&quot;UL1&quot;  protein_id=&quot;ABV71500.1&quot;
   NCBINCC    GenBank   gene  1009 1120 .   -   .  gene_id=&quot;UL4&quot;  protein_id=&quot;ABV71520&quot;
   NCBINCC    GenBank   gene  1135 1200 .   -   .  gene_id=&quot;UL6&quot;  protein_id=&quot;ABV71525&quot;
  </code></pre>
  <p>I have seen <a href="https://stackoverflow.com/questions/62179946/how-to-add-double-quotes-in-a-specific-column">this answer</a> for shell, but wanted to know if there was a way to also do it in R. Thank you kindly.</p>