webpmux.1: correct grammar
argument -> arguments
.\" Hey, EMACS: -*- nroff -*-
-.TH WEBPMUX 1 "December 1, 2017"
+.TH WEBPMUX 1 "April 23, 2018"
.SH NAME
webpmux \- create animated WebP files from non\-animated WebP images, extract
frames from animated WebP images, and manage XMP/EXIF metadata and ICC profile.
@@ -58,7 +58,7 @@ command.
\fBwebpmux\fP can be used to create/extract from animated WebP files, as well as
to add/extract/strip XMP/EXIF metadata and ICC profile.
If a single file name (not starting with the character '\-') is supplied as
-the argument, the command line argument are actually tokenized from this file.
+the argument, the command line arguments are actually tokenized from this file.
This allows for easy scripting or using large number of arguments.
.SH OPTIONS
.SS GET_OPTIONS (\-get):
