Last Old-Type Text Buffers

[rjkroege]

With this version, we have working new-type text buffers (file.Buffer) but it is not yet the default. Since the last release, most changes have been internal: preparing for new-type buffers. However, "visible" changes here also include

• more efficient tag updating (only update the tag when necessary)
• bug fixes and tests for cross-window undo / redo actions
• fixed some race conditions

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This discussion was created from the release Last Old-Type Text Buffers.

[rjkroege]

Addendum: ToT will be on the new-type buffers from here on out.