Question

On what line number is the tag closed?

Answer 1

I don't have the file/snippet you mean — please paste the HTML/XML (or tell me the filename and tag name). Meanwhile, here are quick ways to find the closing-tag line number yourself.

1) Simple shell (find first literal closing tag </tag>):
- grep:
grep -n -m1 '</tag>' file.html | cut -d: -f1
(replace tag and file.html)

- awk (prints line number of first match):
awk '/<\/tag>/{print NR; exit}' file.html

2) Find any closing tag (regex):
grep -n -E '</[A-Za-z0-9:_-]+' file.html

3) If you need the matching closing tag for a specific opening tag in nested XML/HTML:
- Python with lxml (reports element line numbers; element.sourceline is where the start tag appears — see note):
from lxml import etree
tree = etree.parse('file.xml')
for el in tree.iter('tag'):
print('start line:', el.sourceline)
# lxml records start-line; to find end-line you'd need to examine the source text around the element

To get the exact closing-tag line for nested elements reliably, you can read the file and search for the closing tag after the element start:
with open('file.xml','r') as f:
lines = f.readlines()
# if you know start_line from lxml (s):
for i in range(s, len(lines)):
if '</tag>' in lines[i]:
print(i+1); break

4) If you paste the snippet here I’ll point to the exact line number and explain if it’s self-closing or mismatched.