[gimp-help-2] desaturate: content update in the progress

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 8ca3faf113b8e23822e7cdb5e44cfc6bf5979da2
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sun Jan 29 15:22:33 2017 +0300

    desaturate: content update in the progress

 src/menus/colors/desaturate/desaturate.xml |   39 +++++++++++++++++++++++----
 1 files changed, 33 insertions(+), 6 deletions(-)
---
diff --git a/src/menus/colors/desaturate/desaturate.xml b/src/menus/colors/desaturate/desaturate.xml
index f96dc82..54b023a 100644
--- a/src/menus/colors/desaturate/desaturate.xml
+++ b/src/menus/colors/desaturate/desaturate.xml
@@ -79,17 +79,14 @@
           </informalequation>
         </listitem>
       </varlistentry>
-      <varlistentry id="plug-in-desaturate-luminosity">
-        <term>Luminosity</term>
+        <term>Luma</term>
         <listitem>
           <para>The graylevel will be calculated as</para>
           <informalequation>
             <mediaobject>
               <textobject>
                 <phrase>
-                  Luminosity = 0.21 &times; R +
-                               0.72 &times; G +
-                               0.07 &times; B
+                  Luma = 0.21 &times; R + 0.72 &times; G + 0.07 &times; B
                 </phrase>
               </textobject>
             </mediaobject>
@@ -109,6 +106,23 @@
           </informalequation>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term>Luminance</term>
+        <listitem>
+          <para>The graylevel will be calculated as</para>
+          <informalequation>
+            <mediaobject>
+              <textobject>
+                <phrase>
+                  Luminance = 0.21 &times; R +
+                               0.72 &times; G +
+                               0.07 &times; B
+                </phrase>
+              </textobject>
+            </mediaobject>
+          </informalequation>
+        </listitem>
+      </varlistentry>
     </variablelist>
     <figure>
       <title>Comparing the three options</title>
@@ -138,7 +152,7 @@
         </imageobject>
         <caption>
           <para>
-            <quote>Luminosity</quote> applied.
+            <quote>Luma</quote> applied.
             <!-- The result is brighter. -->
           </para>
         </caption>
@@ -155,6 +169,19 @@
           </para>
         </caption>
       </mediaobject>
+<!--  Find out what Luminance and Luma really do
+      <mediaobject>
+        <imageobject>
+          <imagedata format="PNG"
+            fileref="images/toolbox/colors-desaturate-luminance.png"/>
+        </imageobject>
+        <caption>
+          <para>
+            <quote>Luminance</quote> applied.
+          </para>
+        </caption>
+      </mediaobject>
+-->
       <!-- XXX:
         The conclusions above are true only for this special example;
         e.g. try