Changes

Changes from Mercurial (hg http://isabelle.in.tum.de/repos/isabelle/ default)

Highlight that 'intro_locales' and 'trace_locales' are useful debug features, plus minor clarifications.

Changeset 72804:d7393c35aa5d by ballarin: Highlight that 'intro_locales' and 'trace_locales' are useful debug features, plus minor clarifications.
The file was modified	`src/Doc/Isar_Ref/Spec.thy`