[libhandy] doc: Document the HdyColumn to HdyClamp migration

[Alexander Mikhaylenko <alexm src gnome org>]

commit b509fd4b899f335afbf11e782a0c43c50a79cd65
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Jun 16 13:20:39 2020 +0200

    doc: Document the HdyColumn to HdyClamp migration

 doc/handy-docs.xml             |  2 +-
 doc/hdy-migrating-0-0-to-1.xml | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/doc/handy-docs.xml b/doc/handy-docs.xml
index 6cfe9e31..b31f5af8 100644
--- a/doc/handy-docs.xml
+++ b/doc/handy-docs.xml
@@ -40,7 +40,7 @@
     <xi:include href="xml/hdy-application-window.xml"/>
     <xi:include href="xml/hdy-avatar.xml"/>
     <xi:include href="xml/hdy-carousel.xml"/>
-    <xi:include href="xml/hdy-column.xml"/>
+    <xi:include href="xml/hdy-clamp.xml"/>
     <xi:include href="xml/hdy-combo-row.xml"/>
     <xi:include href="xml/hdy-deck.xml"/>
     <xi:include href="xml/hdy-enum-value-object.xml"/>
diff --git a/doc/hdy-migrating-0-0-to-1.xml b/doc/hdy-migrating-0-0-to-1.xml
index 39a13055..9c239058 100644
--- a/doc/hdy-migrating-0-0-to-1.xml
+++ b/doc/hdy-migrating-0-0-to-1.xml
@@ -88,7 +88,7 @@
       </para>
       <para>
         Affected widgets:
-        #HdyActionRow, #HdyColumn, #HdyComboRow, #HdyExpanderRow,
+        #HdyActionRow, #HdyComboRow, #HdyExpanderRow,
         #HdyPreferencesGroup, #HdyPreferencesPage, #HdyPreferencesRow,
         #HdyPreferencesWindow, #HdySqueezer, #HdyTitleBar, #HdyViewSwitcherBar,
         #HdyViewSwitcher
@@ -103,6 +103,17 @@
       </para>
     </refsect3>
 
+    <refsect3>
+      <title>Replace HdyColumn by HdyClamp</title>
+      <para>
+        HdyColumn has been renamed #HdyClamp as it now implements
+        #GtkOrientable, so you should replace the former by the later.
+        Its “maximum-width” and “linear-growth-width” properties have been
+        renamed #HdyClamp:maximum-size and #HdyClamp:tightening-threshold
+        respectively to better reflect their role.
+      </para>
+    </refsect3>
+
     <refsect3>
       <title>Replace HdyPaginator by HdyCarousel</title>
       <para>