Backport commit eeecac7 from Emacs

Fix minor quoting problems in doc strings
eeecac7ab9d1f8c3a29cffe4586e5fd2414dd671
Paul Eggert
Wed Dec 7 11:31:16 2016 -0800

lisp/ox-latex.el

@@ -1021,7 +1021,7 @@ be a list containing two strings: the name of the option, and the
 value.  For example,
 
   (setq org-latex-minted-options
-    '((\"bgcolor\" \"bg\") (\"frame\" \"lines\")))
+    \\='((\"bgcolor\" \"bg\") (\"frame\" \"lines\")))
 
 will result in src blocks being exported with
 
@@ -1060,7 +1060,7 @@ exported.  This format string may contain these elements:
 For example,
 
   (setq org-latex-custom-lang-environments
-     '((python \"pythoncode\")
+     \\='((python \"pythoncode\")
        (ocaml \"\\\\begin{listing}
 \\\\begin{minted}[%o]{ocaml}
 %s\\\\end{minted}

lisp/ox-odt.el

@@ -847,7 +847,7 @@ ON-OR-OFF                 := t | nil
 For example, with the following configuration
 
 \(setq org-odt-table-styles
-      '((\"TableWithHeaderRowsAndColumns\" \"Custom\"
+      \\='((\"TableWithHeaderRowsAndColumns\" \"Custom\"
          ((use-first-row-styles . t)
           (use-first-column-styles . t)))
         (\"TableWithHeaderColumns\" \"Custom\"