Hi,

While working on code navigation for sh-mode with tree-sitter I think I
found a bug.

When invoking `treesit-search-forward' the deepest nested function is
returned instead of the first found node.

;; Contests of test.py
#!/usr/bin/env python
                         <---- Point position 1
def foo():
    def bar():           <---- Point destination 1
        return 21
    return 2 * bar()
                         <---- Point position 2
def fuz():
    def bur():
      def buz():         <---- Point destination 2
        return 21
      return buz() + buz()
    return 1 * bur()

Step to reproduce:
emacs -nw -Q  ;; built from master
M-: (require 'treesit)
C-x C-f test.py
M-x python-ts-mode
;; move point to position 1
M-:  (goto-char (treesit-node-start (treesit-search-forward
(treesit-node-at (point)) "function_definition")))
;; point is now at destination 1
;; move point to position 2
M-:  (goto-char (treesit-node-start (treesit-search-forward
(treesit-node-at (point)) "function_definition")))
;; point is now at destination 2

Is this the intended behaviour?

-- 
João Paulo L. de Carvalho
Ph.D Computer Science |  IC-UNICAMP | Campinas , SP - Brazil
Postdoctoral Research Fellow | University of Alberta | Edmonton, AB - Canada
joao.carvalho@ic.unicamp.br
joao.carvalho@ualberta.ca