[gnome-screenshot] Fix a grammar mistake in the man page

[Matthew Leeds <mwleeds src gnome org>]

commit ecd1545283a160e157e20752e75ce58c33a53408
Author: Matthew Leeds <matthew leeds endlessm com>
Date:   Sun Jan 14 17:43:38 2018 -0800

    Fix a grammar mistake in the man page

 src/gnome-screenshot.1 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-screenshot.1 b/src/gnome-screenshot.1
index ad82dd0..4a91e30 100644
--- a/src/gnome-screenshot.1
+++ b/src/gnome-screenshot.1
@@ -7,7 +7,7 @@ gnome-screenshot \- capture the screen, a window, or an user-defined area and sa
 .SH "DESCRIPTION"
 .PP
 \fBgnome-screenshot\fR is a GNOME utility for taking
-screenshots of the entire screen, a window or an user-defined area of the screen, with optional beautifying
+screenshots of the entire screen, a window or a user-defined area of the screen, with optional beautifying
 border effects.
 .SH "OPTIONS"
 .TP