[doc] Make BasicBot example a ConfigParserBot to explain the usage

Change-Id: I0f644e2975772c1b1886e846bc7b872f0051b0be
---
M scripts/basic.py
1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/scripts/basic.py b/scripts/basic.py
index 5a767f7..3549691 100755
--- a/scripts/basic.py
+++ b/scripts/basic.py
@@ -23,8 +23,22 @@
 
 -summary:         Set the action summary message for the edit.
 
+All settings can be made either by giving option with the command line
+or with a settings file which is scripts.ini by default. If you don't
+want the default values you can add any option you want to change to
+that settings file below the [basic] section like:
 
-The following generators and filters are supported:
+    [basic] ; inline comments starts with colon
+    # This is a commend line. Assignments may be done with '=' or ':'
+    text: A text with line break and
+        continuing on next line to be put
+    replace: yes ; yes/no, on/off, true/false and 1/0 is also valid
+    summary = Bot: My first test edit with pywikibot
+
+Every script has its own section with the script name as header.
+
+In addition the following generators and filters are supported but
+cannot be set by settings file:
 
 &params;
 """
@@ -37,7 +51,8 @@
 from pywikibot import pagegenerators
 
 from pywikibot.bot import (
-    SingleSiteBot, ExistingPageBot, NoRedirectPageBot, AutomaticTWSummaryBot)
+    SingleSiteBot, ConfigParserBot, ExistingPageBot, NoRedirectPageBot,
+    AutomaticTWSummaryBot)
 from pywikibot.tools import PYTHON_VERSION
 
 if PYTHON_VERSION >= (3, 9):
@@ -53,6 +68,7 @@
 class BasicBot(
     # Refer pywikobot.bot for generic bot classes
     SingleSiteBot,  # A bot only working on one site
+    ConfigParserBot,  # A bot which reads options from scripts.ini setting file
     # CurrentPageBot,  # Sets 'current_page'. Process it in treat_page method.
     #                  # Not needed here because we have subclasses
     ExistingPageBot,  # CurrentPageBot which only treats existing pages

