How to open svg tag for editing?

Question

SVG

For example, this svg

<svg version="1.1"
     baseProfile="full"
     width="300" height="200"
     xmlns="http://www.w3.org/2000/svg">
  <rect width="100%" height="100%" fill="black" />
  <circle cx="150" cy="100" r="90" fill="blue" />
</svg>

how to open it?

Answer 1

Err... nano, sed, ed, vi, ёmacs and... a long list of text editors. Oh yes, notepad, save as, otherwise he does not know how.
Well, you can also close, although it is not required.