Documentation fixes

cpdfcommand.ml

@@ -1793,7 +1793,7 @@ and specs =
       " Justify multiline text right");
    ("-justify-center",
       Arg.Unit setjustifycenter,
-      " Justify multiline text centre");
+      " Justify multiline text center");
    ("-underneath",
       Arg.Unit setunderneath,
       " Text stamp is underneath content");
@@ -1856,7 +1856,7 @@ and specs =
        " Output file information");
    ("-page-info",
        Arg.Unit (setop PageInfo),
-       " Output file information");
+       " Output page information");
    ("-set-author",
        Arg.String setauthor,
        " Set Author");
@@ -1895,7 +1895,7 @@ and specs =
       " Just set XMP metadata, not old-fashioned metadata");
    ("-create-metadata",
       Arg.Unit (setop CreateMetadata),
-      " Create XML metadata from scratch.");
+      " Create XMP metadata from scratch.");
    ("-set-page-layout",
       Arg.String setpagelayout,
       " Set page layout upon document opening");

cpdfmanual.tex

@@ -2169,7 +2169,7 @@ $cpdf -list-attached-files 14psfonts.pdf
 The \texttt{-dump-attachments} operation, when given a PDF file and a directory path as the output, will write each attachment under its filename (as displayed by \texttt{-list-attached-files} to thath directory. The directory must exist prior to the call.
 
   \begin{framed}
-    \small\verb!cpdf -dump-attached-files in.pdf -o /home/fred/attachments!
+    \small\verb!cpdf -dump-attachments in.pdf -o /home/fred/attachments!
   \end{framed}
 
 \noindent  Unless the \texttt{-raw} option is given, the filenames are stripped of dubious special characters before writing. It is converted from unicode to 7 bit ASCII, and the following characters are removed, in addition to any character with ASCII code less than 32: