[PATCH] Process hlines in imported tables

[Rick Frankel <rick@rickster.com>]

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Currently, there is no way to include an hline in an imported or
converted table. The `org-babel-import-elisp-from-file converts lines
starting with '-' (or '|-') to an integer 0, because, even though
`org-table-to-lisp' will correctly convert lines starting with "|-",
because `org-table-convert-region' always puts "| " at the begining of
each line.

This patch solves that by not putting a space after the pipe symbol if
the first character of the line is a dash ("-").

rick

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From 86ee5bfcaa7513769cc3e2939c5e0b1a1f3c7706 Mon Sep 17 00:00:00 2001
From: Rick Frankel <rick@rickster.com>
Date: Thu, 28 Mar 2013 21:34:06 -0400
Subject: [PATCH] When importing or converting table, convert rows starting
 with "-" to horizontal (hlines).

* lisp/ob-core.el (org-babel-import-elisp-from-file): Check if row in
  an array or 'hline.
* lisp/org-table.el (org-table-convert-region): Don't put space after
  pipe symbol if line starts with '-', so `org-table-to-lisp' will
  match the row against `org-table-hline-regexp'.
---
 lisp/ob-core.el   | 3 ++-
 lisp/org-table.el | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index a63f77e..93b12b2 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -2537,7 +2537,8 @@ If the table is trivial, then return it as a scalar."
 	      (org-table-import file-name separator)
 	      (delete-file file-name)
 	      (setq result (mapcar (lambda (row)
-				     (mapcar #'org-babel-string-read row))
+				     (if (eq row 'hline) 'hline
+				       (mapcar #'org-babel-string-read row)))
 				   (org-table-to-lisp))))
 	  (error (message "Error reading results: %s" err) nil)))
       (if (null (cdr result)) ;; if result is trivial vector, then scalarize it
diff --git a/lisp/org-table.el b/lisp/org-table.el
index f087cf7..da923cc 100644
--- a/lisp/org-table.el
+++ b/lisp/org-table.el
@@ -605,7 +605,8 @@ nil      When nil, the command tries to be smart and figure out the
 		   (format "^ *\\| *\t *\\| \\{%d,\\}" separator)))
 		(t (error "This should not happen"))))
       (while (re-search-forward re end t)
-	(replace-match "| " t t)))
+	(replace-match
+	 (if (= (char-after) ?-) "|" "| ") t t)))
     (goto-char beg)
     (org-table-align)))
 
-- 
1.8.2