fix: correct input field separator in awk exercise

9_batch_processing.Rmd

@@ -176,7 +176,7 @@ Modify this command to only get a list of sequence names in a fasta file
 <details><summary>Solution</summary>
 <p>
 ```sh
-awk -vOFS='' '{print $1 "\n";}' two_column_sample_tab.txt > seq_name.txt
+awk -vFS='\t' -vOFS='' '{print $1 "\n";}' two_column_sample_tab.txt > seq_name.txt
 ```
 </p>
 </details>