Fix: updateTitle regex to match headings without trailing newlines

[samyakjain1908]

Hii @antonmedv .
I had fixed the following code problem.

Problem:

The updateTitle() function uses a regex that requires a newline after the heading:
/^\n*#(.+)\n/

This causes the page title to fail updating when:

• Heading is the last line in the document (no trailing newline)
• Multiple spaces appear after #
• Heading is not at the very start of the content

Example Case:

User types "# Demo Title" at EOF
Expected: Browser tab shows "Demo Title"
Actual: Browser tab shows "Textarea" (fails silently)

Solution
Updated regex to:
/^#\s*(.+)/m
With .trim() on captured text:

What This Fixes:

• Headings at EOF (no trailing newline)
• Multiple spaces after # are normalized
• Multiline mode handles headings anywhere

Test cases to verify:

Before:

After:

[antonmedv]

Should the title be at the beginning of the document only?