[tldoc] tl22 guide typos

[Karl Berry]

Jan spotted some inconsistencies in the new texlive-en text ...
new English versions committed. -k

--- texlive-en.tex	(revision 62542)
+++ texlive-en.tex	(working copy)
@@ -1747,7 +1747,7 @@
 \item[Automatic path adjustment.] No manual configuration steps are required.
 
 \item[Uninstaller.] The installer creates an entry for \TL, either
-  under under `Add/Remove Programs' (admin installation) or under the
+  under `Add/Remove Programs' (admin installation) or under the
   \TL\ menu (single-user installation).
 
 \item[Write-protect.] For an admin installation, the \TL\ directories are
@@ -3902,7 +3902,7 @@
 
 \code{tlmgr} and infrastructure: \begin{itemize*}
 \item Automatically retry (once) packages that fail to download.
-\item New option \texttt{tlmgr check texmfdbs}, to 
+\item New option \texttt{tlmgr check texmfdbs},
 to check consistency of \texttt{ls-R} files and \texttt{!!}\
 specifications for each tree.
 \item Use versioned filenames for the package containers, as in
@@ -4051,12 +4051,12 @@
 Lua\TeX{}: \begin{itemize*}
 \item Support structured destinations from PDF 2.0.
 \item PNG /Smask for PDF 2.0.
-\item Variable font interface for luahbtex.
+\item Variable font interface for \code{luahbtex}.
 \item Different radical style defaults in mathdefaultsmode.
 \item Optionally block selected discretionary creation.
 \item Improvements for TrueType fonts implementation.
 \item More efficient \cs{fontdimen} allocation.
-\item Ignore paragraphs with only a local par node followed by direction
+\item Ignore paragraphs with only a local \code{par} node followed by direction
 synchronization nodes.
 \end{itemize*}
 
@@ -4066,7 +4066,7 @@
 \item Support structured destinations from PDF 2.0.
 \item For letterspaced fonts, use explicit \cs{fontdimen}6 if specified.
 \item Always start a warning at the beginning of a line.
-\item for characters with autokern (\cs{pdfappendkern} and
+\item For characters with autokern (\cs{pdfappendkern} and
 \cs{pdfprependkern}), still do protrusion; likewise, autokern
 both implicit and explicit hyphens.
 \end{itemize*}