updated markdown_generate_index.sh

git/markdown_generate_index.sh

@@ -46,7 +46,7 @@ fi
 # since we now strip ```code``` blocks we must ensure that they match otherwise this code cannot
 # reliably run as it'll result in stripping out valid headings
 
-if [ "$(( $(grep -c '^```' "$markdown_filek) % 2))" != 0 ]; then
+if [ "$(( $(grep -c '^```' "$markdown_file") % 2))" != 0 ]; then
     die "Error - uneven number of code blocks found in file: $markdown_file"
 fi