Emacs and Vim have rectangle-editing commands, these are essential for reasonably convenient editing.
They're so useful, everyone should know them anyway: Need a column of '//' rather than '/* <long_comment_block> */', or vice-versa?. One click-drag and 4-5 keystrokes will do it.
Comments
I don't think I expect people to edit the diagrams on webpages, rather than locally using their favorite text editor.
Emacs and Vim have rectangle-editing commands, these are essential for reasonably convenient editing.
They're so useful, everyone should know them anyway: Need a column of '//' rather than '/* <long_comment_block> */', or vice-versa?. One click-drag and 4-5 keystrokes will do it.