Updated text and header comments in Python and HTML code.

javascript/qrcodegen-js-demo.html

@@ -1,5 +1,5 @@
 <!--
-  - QR Code generator library (C++)
+  - QR Code generator demo (HTML+JavaScript)
   - 
   - Copyright (c) Project Nayuki. (MIT License)
   - https://www.nayuki.io/page/qr-code-generator-library

python/qrcodegen-demo.py

@@ -1,6 +1,9 @@
 # 
 # QR Code generator demo (Python 2, 3)
 # 
+# Run this command-line program with no arguments. The program computes a bunch of demonstration
+# QR Codes and prints them to the console. Also, the SVG code for one QR Code is printed as a sample.
+# 
 # Copyright (c) Project Nayuki. (MIT License)
 # https://www.nayuki.io/page/qr-code-generator-library
 # 

python/setup.py

@@ -85,7 +85,7 @@ Usage
 
 Install this package by downloading the source code ZIP file from PyPI_, or by running ``pip install qrcodegen``.
 
-Examples::
+Examples:
 
     from qrcodegen import *