org-test: Fix <point> feature

* testing/org-test.el (org-test-with-temp-text): Fix point position.

According to the docstring, if the string "<point>" appears in TEXT
then the string "<point>" is removed and point is placed there. The
problem was that after string "<point>" was removed, the point
was *not* placed at the position of the removed text, rather, it was
placed one character before that position which is wrong. The reason
is that Emacs buffer position is a number started from 1, instead of
0, in other words, the value of `(point-min)' is 1 not 0. The problem
is addressed by adding 1 to the calculated position.

TINYCHANGE

testing/org-test.el

@@ -209,11 +209,12 @@ otherwise place the point at the beginning of the inserted text."
      (with-temp-buffer
        (org-mode)
        (let ((point (string-match (regexp-quote "<point>") inside-text)))
-	  (if point
-	      (progn (insert (replace-match "" nil nil inside-text))
-		     (goto-char (match-beginning 0)))
-	    (progn (insert inside-text)
-		   (goto-char (point-min)))))
+	 (if point
+	     (progn
+	       (insert (replace-match "" nil nil inside-text))
+	       (goto-char (1+ (match-beginning 0))))
+	   (progn (insert inside-text)
+		  (goto-char (point-min)))))
        ,@body)))
 (def-edebug-spec org-test-with-temp-text (form body))