emacs-27 ac1a2b2: Add more doc-view requirements

[Lars Ingebrigtsen]

branch: emacs-27
commit ac1a2b216089b03c244c8e7ceb577198eb0dc2c2
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Add more doc-view requirements
    
    * lisp/doc-view.el: Add more requirements.
---
 lisp/doc-view.el | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index 7fdd258..b895377 100644
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -22,10 +22,12 @@
 
 ;;; Requirements:
 
-;; doc-view.el requires GNU Emacs 22.1 or newer.  You also need Ghostscript,
-;; `dvipdf' (comes with Ghostscript) or `dvipdfm' (comes with teTeX or TeXLive)
-;; and `pdftotext', which comes with xpdf (http://www.foolabs.com/xpdf/) or
-;; poppler (http://poppler.freedesktop.org/).
+;; Viewing PS/PDF/DVI files requires Ghostscript, `dvipdf' (comes with
+;; Ghostscript) or `dvipdfm' (comes with teTeX or TeXLive) and
+;; `pdftotext', which comes with xpdf (http://www.foolabs.com/xpdf/)
+;; or poppler (http://poppler.freedesktop.org/).
+;; Djvu documents require `ddjvu' (from DjVuLibre).
+;; ODF files require `soffice' (from LibreOffice).
 
 ;;; Commentary: