[gimp-help] Small grammar fix in curves tool

[Marco Ciampa <marcoc src gnome org>]

commit 050f932155db066e5be0c5e046fcfcb42d0ab72d
Author: Marco Ciampa <ciampix posteo net>
Date:   Mon Sep 2 11:56:21 2019 +0200

    Small grammar fix in curves tool

 src/menus/colors/curves.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/menus/colors/curves.xml b/src/menus/colors/curves.xml
index 85510b283..223571738 100644
--- a/src/menus/colors/curves.xml
+++ b/src/menus/colors/curves.xml
@@ -201,8 +201,8 @@
                 can't drag it beyond the end points.
               </para>
               <para>
-                To <emphasis>move a point</emphasis>, several possibilities 
-                to fine tune the point position. :
+                To <emphasis>move a point</emphasis>, there are several
+                possibilities to fine tune the point position:
                 <itemizedlist>
                   <listitem>
                     <para>