Fix man page syntax errors

doc/vlc-config.1

@@ -11,7 +11,6 @@ the compiler and linker flags that should be used to compile
 and link programs that use \fIlibvlc\fP.
 .
 .SH OPTIONS
-.l
 \fIvlc-config\fP accepts the following options:
 .TP 8
 .B  \-\-version

doc/vlc.1

@@ -30,12 +30,12 @@ multimedia player and server.
 .B VLC
 follows the usual GNU command line syntax, with long
 options starting with two dashes (`-').
-For a precise description of options, please use "vlc --help".
+For a precise description of options, please use "vlc \-\-help".
 
 The complete list of
 .B VLC
 options depends on what plugins are installed because they automatically
-add their own options. Please use "vlc --longhelp --advanced" for a
+add their own options. Please use "vlc \-\-longhelp \-\-advanced" for a
 complete list of available options.
 
 .SH ITEMS