Switch to side-by-side view

--- a/src/INSTALL
+++ b/src/INSTALL
@@ -96,7 +96,7 @@
      * Openoffice: supported natively, but needs the unzip command to be
        installed.
 
-     * PDF: pdftotext is part of the Xpdf package.
+     * PDF: pdftotext is part of the Xpdf or Poppler packages.
 
      * Postscript: pstotext.