tree: Fix various typos and outdated terminology

This was mostly machine generated with the following command:
```
codespell \
    --builtin clear,rare,usage \
    --skip './po/*' --skip './.git/*' --skip './NEWS*' \
    --write-changes .
```
using the latest git version of `codespell` as per [these
instructions](https://github.com/codespell-project/codespell#user-content-updating).

Then I manually checked each change using `git add -p`, made a few
manual fixups and dropped a load of incorrect changes.

There are still some outdated or loaded terms used in GLib, mostly to do
with git branch terminology. They will need to be changed later as part
of a wider migration of git terminology.

If I’ve missed anything, please file an issue!

Signed-off-by: Philip Withnall <withnall@endlessm.com>

gio/tests/gdbus-addresses.c

@@ -39,7 +39,7 @@ test_empty_address (void)
   g_error_free (error);
 }
 
-/* Test that g_dbus_is_supported_address() returns FALSE for an unparseable
+/* Test that g_dbus_is_supported_address() returns FALSE for an unparsable
  * address. */
 static void
 test_unsupported_address (void)

gio/tests/gdbus-export.c

@@ -1279,7 +1279,7 @@ test_object_registration (void)
   g_strfreev (nodes);
   g_assert_cmpint (count_interfaces (c, "/foo/dyna/dynamicallycreated"), ==, 4);
 
-  /* now check that the object hierarachy is properly generated... yes, it's a bit
+  /* now check that the object hierarchy is properly generated... yes, it's a bit
    * perverse that we round-trip to the bus to introspect ourselves ;-)
    */
   nodes = get_nodes_at (c, "/");

gio/tests/gdbus-peer.c

@@ -1862,7 +1862,7 @@ codegen_test_peer (void)
   g_assert (value != NULL);
   g_variant_unref (value);
 
-  /* Give the proxies a chance to refresh in the defaul main loop */
+  /* Give the proxies a chance to refresh in the default main loop */
   g_timeout_add (100, codegen_quit_mainloop_timeout, NULL);
   g_main_loop_run (loop);
 
@@ -1897,7 +1897,7 @@ codegen_test_peer (void)
   g_assert (value != NULL);
   g_variant_unref (value);
 
-  /* Give the proxies a chance to refresh in the defaul main loop */
+  /* Give the proxies a chance to refresh in the default main loop */
   g_timeout_add (1000, codegen_quit_mainloop_timeout, NULL);
   g_main_loop_run (loop);
 

gio/tests/gdbus-proxy-threads.c

@@ -230,7 +230,7 @@ test_proxy (void)
   g_main_loop_unref (loop);
 
   /* TODO: should call session_bus_down() but that requires waiting
-   * for all the oustanding method calls to complete...
+   * for all the outstanding method calls to complete...
    */
   if (g_test_verbose ())
     g_printerr ("\n");

gio/tests/gdbus-proxy.c

@@ -388,7 +388,7 @@ test_proxy_signals_on_emit_signal_cb (GDBusProxy   *proxy,
   g_assert_cmpstr (g_variant_get_type_string (result), ==, "()");
   g_variant_unref (result);
 
-  /* check that the signal was recieved before we got the method result */
+  /* check that the signal was received before we got the method result */
   g_assert_cmpuint (strlen (data->s->str), >, 0);
 
   /* break out of the loop */

gio/tests/gdbus-test-codegen.c

@@ -2434,7 +2434,7 @@ test_interface_stability (void)
  *
  * - check that a property with name "Type" is mapped into g-name "type"
  *   with C accessors get_type_ (to avoid clashing with the GType accessor)
- *   and set_type_ (for symmetri)
+ *   and set_type_ (for symmetry)
  *   (see https://bugzilla.gnome.org/show_bug.cgi?id=679473 for details)
  *
  * - (could add more tests here)

gio/tests/gdbus-threading.c

@@ -409,7 +409,7 @@ test_method_calls_on_proxy (GDBusProxy *proxy)
   guint n, divisor;
 
   /*
-   * Check that multiple threads can do calls without interferring with
+   * Check that multiple threads can do calls without interfering with
    * each other. We do this by creating three threads that call the
    * Sleep() method on the server (which handles it asynchronously, e.g.
    * it won't block other requests) with different sleep durations and

gio/tests/gsubprocess.c

@@ -1046,7 +1046,7 @@ test_communicate_utf8_async (gconstpointer test_data)
   g_object_unref (proc);
 }
 
-/* Test g_subprocess_communicate_utf8_async() can be cancelled correclty. */
+/* Test g_subprocess_communicate_utf8_async() can be cancelled correctly. */
 static void
 test_communicate_utf8_cancelled_async (gconstpointer test_data)
 {
@@ -1721,7 +1721,7 @@ test_launcher_environment (void)
   /* unset a variable */
   g_subprocess_launcher_unsetenv (launcher, "A");
 
-  /* and set a diffferent one */
+  /* and set a different one */
   g_subprocess_launcher_setenv (launcher, "E", "F", TRUE);
 
   args = get_test_subprocess_args ("printenv", "A", "C", "E", NULL);

gio/tests/gtlsconsoleinteraction.c

@@ -32,7 +32,7 @@
 
 /*
  * WARNING: This is not the example you're looking for [slow hand wave]. This
- * is not industrial strength, it's just for testing. It uses embarassing
+ * is not industrial strength, it's just for testing. It uses embarrassing
  * functions like getpass() and does lazy things with threads.
  */
 

gio/tests/live-g-file.txt

@@ -3,7 +3,7 @@ Before you start testing it would be good to explain how it works.
 The script works in three modes:
  1. read-only (no special arguments) - suitable for read-only backends. Just 
         create the sample structure using the second mode, pack it (tar -p is 
-        preffered to preserve unix modes) and put it on a reachable place.
+        preferred to preserve unix modes) and put it on a reachable place.
  2. create-structure - only creates reference structure for later testing 
         in read-only mode
  3. write mode - full test suite, creates testing structure and performs all 

gio/tests/resourceplugin.c

@@ -4,7 +4,7 @@
  * This must be done before including any GLib headers,
  * since GLIB_AVAILABLE_IN_ALL, which is used to mark the
  * g_io_module*() symbols, is defined to be _GLIB_EXTERN,
- * which must be overriden to export the symbols.
+ * which must be overridden to export the symbols.
  */
 #include "modules/symbol-visibility.h"
 #define _GLIB_EXTERN GLIB_TEST_EXPORT_SYMBOL

gio/tests/resources.c

@@ -605,7 +605,7 @@ test_resource_binary_linked (void)
 
 /* Test resource whose xml file starts with more than one digit
  * and where no explicit c-name is given
- * Checks if resources are sucessfully registered and
+ * Checks if resources are successfully registered and
  * data can be found and read. */
 static void
 test_resource_digits (void)

gio/tests/socket-service.c

@@ -63,7 +63,7 @@ test_start_stop (void)
   saddr = g_inet_socket_address_new (iaddr, 0);
   g_object_unref (iaddr);
 
-  /* instanciate with g_object_new so we can pass active = false */
+  /* instantiate with g_object_new so we can pass active = false */
   service = g_object_new (G_TYPE_SOCKET_SERVICE, "active", FALSE, NULL);
   g_assert_false (g_socket_service_is_active (service));
 

gio/tests/test2.gresource.xml

@@ -4,7 +4,7 @@
     <file>test1.txt</file>
   </gresource>
   <!-- Test compiling the generated GResource C-code
-       that has a resouce entry size over 65536 bytes -->
+       that has a resource entry size over 65536 bytes -->
   <gresource prefix="/big_prefix">
     <file>gresource-big-test.txt</file>
   </gresource>

gio/tests/tls-certificate.c

@@ -285,7 +285,7 @@ from_files (const Reference *ref)
   g_assert_null (cert);
 
   /* Using this method twice with a file containing both private key and
-   * certificate as a way to inforce private key presence is a fair use
+   * certificate as a way to enforce private key presence is a fair use
    */
   cert = g_tls_certificate_new_from_files (g_test_get_filename (G_TEST_DIST, "cert-tests", "key-cert.pem", NULL),
                                            g_test_get_filename (G_TEST_DIST, "cert-tests", "key-cert.pem", NULL),