* mark.texi (Mark): Rearrange nodes.

* mark.texi (Mark): Rearrange nodes.
(Persistent Mark): Rename from Transient Mark.
(Mark, Setting Mark, Marking Objects, Persistent Mark, Mark Ring):
Describe Transient Mark mode as the default.

* basic.texi (Basic Undo): Don't mention setting the mark, which isn't
the default behavior with Transient Mark mode off.
(Position Info): Fix typo.

* display.texi (Standard Faces): Reference the Mark node.  Remove
discussion of the region face, which is discussed there.

* emacs.texi (Top): Update node listings.

* files.texi (Diff Mode, Misc File Ops): Describe Transient Mark mode
as the default.

* fixit.texi (Undo): Standardize choice of undo key sequence.
(Undo, Spelling): Describe Transient Mark mode as the default.

* frames.texi (Mouse Commands): Treat Transient Mark mode as the
default.

* glossary.texi (Glossary): Treat Transient Mark mode as the default.

* killing.texi (Kill Ring, Accumulating Text): Assume Transient Mark
mode is the default, and note that the mark is not activated when set.

* programs.texi (Moving by Defuns, Expressions, Comment Commands):
Describe Transient Mark mode as the default.

* search.texi (Basic Isearch): Reference the Mark Ring node.
(Replace, Unconditional Replace, Other Repeating Search):
Describe Transient Mark mode as the default.

* text.texi (Words, Pages, Fill Commands, HTML Mode): Describe
Transient Mark mode as the default.
(Paragraphs): Describe how M-h behaves when region is active.

* trouble.texi (Quitting): Clarify effects of C-g.