[gimp/gimp-2-10] devel-docs: Fix typo

[Jehan <jehanp src gnome org>]

commit f4ff636dd3e7402f127414141d2733afdfcdd5ad
Author: lillolollo <4179-lillolollo users noreply gitlab gnome org>
Date:   Mon Jun 15 18:12:53 2020 +0000

    devel-docs: Fix typo

 devel-docs/gpb.txt                   | 2 +-
 devel-docs/libgimp/libgimp-docs.sgml | 2 +-
 devel-docs/xcf.txt                   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/devel-docs/gpb.txt b/devel-docs/gpb.txt
index 4187b62459..154c8a01be 100644
--- a/devel-docs/gpb.txt
+++ b/devel-docs/gpb.txt
@@ -7,5 +7,5 @@ Gimp Pixmap Brush File Format
 The current format for gpb files, the pixmap
 brush format is very simple. What it essentially
 boils down to is a greyscale gbr (gimp brush) and
-a rgb pat (gimp pattern) concatented into the same file.
+a rgb pat (gimp pattern) concatenated into the same file.
 
diff --git a/devel-docs/libgimp/libgimp-docs.sgml b/devel-docs/libgimp/libgimp-docs.sgml
index 51062f9cb6..a4401f258b 100644
--- a/devel-docs/libgimp/libgimp-docs.sgml
+++ b/devel-docs/libgimp/libgimp-docs.sgml
@@ -38,7 +38,7 @@
     </chapter>
 
     <chapter id="libgimp-image">
-      <title>Manupulating Images and their Properties</title>
+      <title>Manipulating Images and their Properties</title>
       <xi:include href="xml/gimpchannel.xml" />
       <xi:include href="xml/gimpcolor.xml" />
       <xi:include href="xml/gimpdisplay.xml" />
diff --git a/devel-docs/xcf.txt b/devel-docs/xcf.txt
index 2e8be40630..945c30c18b 100644
--- a/devel-docs/xcf.txt
+++ b/devel-docs/xcf.txt
@@ -1339,7 +1339,7 @@ PROP_MODE (essential)
                      31: Screen
                      32: Difference
                      33: Addition
-                     34: Substract
+                     34: Subtract
                      35: Darken only
                      36: Lighten only
                      37: Hue (HSV)