docs: move "CodeIgniter Error Logs" from troubleshooting.rst

Author: kenjis

user_guide_src/source/installation/troubleshooting.rst

@@ -102,9 +102,4 @@ After that, reload the page. You will see the error and the back trace.
 CodeIgniter Error Logs
 ----------------------
 
-CodeIgniter logs error messages, according to the settings in **app/Config/Logger.php**.
-
-You can adjust the error threshold to see more or fewer messages. See :ref:`Logging <logging-configuration>` for details.
-
-The default configuration has daily log files stored in **writable/logs**.
-It would be a good idea to check them if things aren't working the way you expect!
+See :ref:`codeigniter-error-logs`.

user_guide_src/source/testing/debugging.rst

@@ -6,6 +6,23 @@ Debugging Your Application
     :local:
     :depth: 2
 
+*************
+Checking Logs
+*************
+
+.. _codeigniter-error-logs:
+
+CodeIgniter Error Logs
+======================
+
+CodeIgniter logs error messages, according to the settings in **app/Config/Logger.php**.
+
+The default configuration has daily log files stored in **writable/logs**.
+It would be a good idea to check them if things aren't working the way you expect!
+
+You can adjust the error threshold to see more or fewer messages. See
+:ref:`Logging <logging-configuration>` for details.
+
 ********************
 Replacing var_dump()
 ********************