org.texi: Small fixes to documentation

doc/org.texi

@@ -11150,7 +11150,7 @@ All lines between these markers are exported literally
 @LaTeX{} understands attributes specified in an @code{ATTR_LATEX} line.  They
 affect tables, images, plain lists, special blocks and source blocks.
 
-@subsubsection Tables in @LaTeX{} export
+@subsubheading Tables in @LaTeX{} export
 @cindex tables, in @LaTeX{} export
 
 For @LaTeX{} export of a table, you can specify a label and a caption
@@ -11211,7 +11211,6 @@ to matrix macros that require more than one argument (e.g.,
 Thus, attributes can be used in a wide array of situations, like writing
 a table that will span over multiple pages, or a matrix product:
 
-@cindex #+ATTR_LATEX
 @example
 #+ATTR_LATEX: :environment longtable :align l|lp@{3cm@}r|l
 | ..... | ..... |
@@ -11225,7 +11224,7 @@ a table that will span over multiple pages, or a matrix product:
 | 3 | 4 |
 @end example
 
-@subsubsection Images in @LaTeX{} export
+@subsubheading Images in @LaTeX{} export
 @cindex images, inline in @LaTeX{}
 @cindex inlining images in @LaTeX{}
 
@@ -11272,7 +11271,7 @@ To modify the placement option of any floating environment, set the
 Eventually, in the @code{:comment-include} attributes has a non-nil value,
 the code actually including the image will be commented out.
 
-@subsubsection Plain lists in @LaTeX{} export
+@subsubheading Plain lists in @LaTeX{} export
 @cindex plain lists, in @LaTeX{} export
 
 Plain lists accept two optional attributes: @code{:environment} and
@@ -11285,7 +11284,7 @@ arguments for that environment (square brackets may be omitted).
 - you need ``paralist'' package to reproduce this example.
 @end example
 
-@subsubsection Source blocks in @LaTeX{} export
+@subsubheading Source blocks in @LaTeX{} export
 @cindex source blocks, in @LaTeX{} export
 
 In addition to syntax defined in @ref{Literal examples}, names and captions
@@ -11299,7 +11298,7 @@ Code that may not fit in a single page.
 #+END_SRC
 @end example
 
-@subsubsection Special blocks in @LaTeX{} export
+@subsubheading Special blocks in @LaTeX{} export
 @cindex special blocks, in @LaTeX{} export
 
 In @LaTeX{} back-end, special blocks become environments of the same name.
@@ -11523,8 +11522,8 @@ export.
 Export as an OpenDocument Text file and open the resulting file.
 
 @vindex org-odt-preferred-output-format
-If @code{org-preferred-output-format} is specified, open the converted file
-instead.  @xref{x-export-to-other-formats, , Automatically exporting to
+If @code{org-odt-preferred-output-format} is specified, open the converted
+file instead.  @xref{x-export-to-other-formats, , Automatically exporting to
 other formats}.
 @end table