Leo 5.1-b1 released

Leo 5.1 b1 is now available at SourceForge.

This release features @clean trees, one of the most important developments in Leo's history.

The highlights of Leo 5.1

@clean trees create external files without sentinel comments, yet Leo can update @clean trees from changes made to the corresponding external files, something long thought impossible.

@clean trees preserve clone links and user attributes (uA's). Reading @clean trees is faster than reading @auto or @shadow trees. Steve Zatz explains why @clean changes everything.
  
The Mulder/Ream algorithm updates @clean trees from changes made in the corresponding external files. This is a completely rewritten and much simpler version of Bernhard Mulder's original @shadow update algorithm.

More highlights

• A new web page displays .leo files in the browser.
• Added command history to Leo's minibuffer.
• A new IdleTime class greatly simplifies idle-time handling.
• Leo now honors @language inside @doc parts
• @data nodes can be composed of their descendant nodes.
• @int qt-cursor-width = 5 is great for geriatric eyes.

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