Simplify the homepage example and lengthen tutorial step 2

The homepage example built its own widget list, which hid the point
that one wrapped loop already gives a working bar. It is now the first
tutorial example verbatim, as the index page already claimed. The demo
records at 80 columns instead of 60, since the default widget set left
a two-character bar at the narrower width.

Tutorial step 2 iterates 1000 items instead of 100, so its recording
shows the counter climbing further.

Author: wolph

docs/_static/demos/homepage-quickstart.svg

@@ -58,7 +58,9 @@ def svg_path(self) -> pathlib.Path:
 
 DEMOS: tuple[Demo, ...] = (
     Demo(
-        'homepage/quickstart', 'A percentage and a coloured bar', term_width=60
+        'homepage/quickstart',
+        'A working progress bar in one line',
+        term_width=80,
     ),
     Demo('howto/colors', 'Fixed and gradient bar colors'),
     Demo('howto/custom-widget', 'The current job phase', term_width=60),

docs/_static/demos/tutorial-step2.svg

@@ -1,16 +1,13 @@
-"""Show a percentage and a bar that changes colour as work progresses."""
+"""Wrap an iterable to show its progress."""
 
 import time
 
 import progressbar
 
 
 def main() -> None:
-    for _ in progressbar.progressbar(
-        range(100),
-        widgets=[progressbar.Percentage(), ' ', progressbar.Bar()],
-    ):
-        time.sleep(0.03)
+    for _ in progressbar.progressbar(range(100), fast=False):
+        time.sleep(0.01)
 
 
 if __name__ == '__main__':

docs/examples/_registry.py

@@ -13,7 +13,7 @@
 
 def main() -> None:
     with progressbar.ProgressBar() as bar:
-        for i in range(100):
+        for i in range(1000):
             time.sleep(0.01)
             bar.update(i + 1)