[gtkmm-documentation] "The .hg and .ccg files" section: Describe 'ignore_deprecations'

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 855d7d78b6ea4b4d8928a08cc3b1132fbaa8b3c3
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Nov 26 18:31:08 2021 +0100

    "The .hg and .ccg files" section: Describe 'ignore_deprecations'
    
    ignore_deprecations is a new optional argument in _WRAP_METHOD().

 docs/tutorial/C/index-in.docbook | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/docs/tutorial/C/index-in.docbook b/docs/tutorial/C/index-in.docbook
index d492756..dda4f3b 100644
--- a/docs/tutorial/C/index-in.docbook
+++ b/docs/tutorial/C/index-in.docbook
@@ -9805,6 +9805,14 @@ _WRAP_METHOD(void set_text(const Glib::ustring&amp; text), gtk_entry_set_text)
                 parameter.</para>
         </listitem>
     </varlistentry>
+    <varlistentry>
+        <term>ignore_deprecations</term>
+        <listitem>
+            <para>Puts the generated code in the .cc file in a
+                G_GNUC_BEGIN_IGNORE_DEPRECATIONS / G_GNUC_END_IGNORE_DEPRECATIONS
+                block. (Only in glibmm&nbsp;>=&nbsp;2.70.1)</para>
+        </listitem>
+    </varlistentry>
     <varlistentry>
         <term>constversion</term>
         <listitem>