How create fringes without spaces in emacs

Question

How to remove bottom vertical space between fringes ?

fringes-example

I have the following code

(defun test--fringe() 
  (interactive) 
  (save-excursion (let ((ov (make-overlay (point) 
                                          (+ 1 (point))))) 
                    (overlay-put ov 'before-string (propertize "x" 'display '(left-fringe
                                                                              filled-rectangle
                                                                              error)))) 
                  (forward-line)
                  (let ((ov (make-overlay (point) 
                                          (+ 1 (point))))) 
                    (overlay-put ov 'before-string (propertize "x" 'display '(left-fringe
                                                                              filled-rectangle
                                                                              error))))))

Answer 1

Do you see that if you start Emacs using emacs -Q? I don't. If you don't, then bisect your init file to find the culprit.

---

Perhaps you or some code you use has customized option line-spacing? C-h v says:

line-spacing is a variable defined in C source code.

Its value is nil

Automatically becomes buffer-local when set.

Documentation:

Additional space to put between lines when displaying a buffer.

The space is measured in pixels, and put below lines on graphic displays, see display-graphic-p.

If value is a floating point number, it specifies the spacing relative to the default frame line height. A value of nil means add no extra space.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.