Changed gendered terms to be gender-neutral

docs/reference/gio/overview.xml

@@ -161,7 +161,7 @@
   <para>
     The GIO model of I/O is stateful: if an application establishes e.g.
     a SFTP connection to a server, it becomes available to all applications
-    in the session; the user does not have to enter his password over
+    in the session; the user does not have to enter their password over
     and over again.
   </para>
   <para>
@@ -279,7 +279,7 @@ excellent book on this topic,
 When using GIO in code that runs with elevated privileges, you have to
 be careful. GIO has extension points whose implementations get loaded
 from modules (executable code in shared objects), which could allow
-an attacker to sneak his own code into your application by tricking it
+an attacker to sneak their own code into your application by tricking it
 into loading the code as a module. However, GIO will never load modules
 from your home directory except when explicitly asked to do so via an
 environment variable.

glib/gconvert.c

@@ -142,7 +142,7 @@
  *    "Unknown file name" in its title bar but still let the user save
  *    the file, as it would keep the raw file name internally. This
  *    can happen if the user has not set the `G_FILENAME_ENCODING`
- *    environment variable even though he has files whose names are
+ *    environment variable even though they have files whose names are
  *    not encoded in UTF-8.
  *
  * 3. If your user interface lets the user type a file name for saving

glib/gdataset.c

@@ -901,7 +901,7 @@ g_datalist_id_dup_data (GData          **datalist,
  * If the previous value was replaced then ownership of the
  * old value (@oldval) is passed to the caller, including
  * the registered destroy notify for it (passed out in @old_destroy).
- * Its up to the caller to free this as he wishes, which may
+ * Its up to the caller to free this as they wish, which may
  * or may not include using @old_destroy as sometimes replacement
  * should not destroy the object in the normal way.
  *