removed obsolete verbatim_source, results, chapter, section etc.; removed redundant end_index, end_theory;

ProofDisplay.add_hook;

simplified present_local_theory/proof;

ProofDisplay.theory_results;

removed obsolete present_results; added theory_results, which is subject to hooks (formerly in present.ML);

scan: SymbolPos.tabify_content when creating tokens (for proper presentation output);

load_thy: no untabify (preserve position information!), present spans instead of verbatim source;

simplified markup commands;

simplified markup commands -- removed obsolete Present.results, always check text;

added untabify_content;

tuned;

removed obsolete untabify (superceded by SymbolPos.tabify_content);

tuned document;

removed obsolete theorems; handle generic XML markup as well (plain <markup> instead of <... class=markup>); misc tuning/update according to Pure/Generic/markup.ML;

Changed proof of strong induction rule to avoid infinite loop when premises of introduction rules contain equations.

token_kind_markup: complete coverage;

OuterSyntax.scan: pass position;

message: ignored if body empty;

load_thy: removed obsolete dir argument;

abstract type span, tuned interfaces; added report_token, report_span; markup ident tokens;

adapted ThyEdit operations;

added ignored, malformed transitions;

Symbol.source/OuterLex.source: more explicit do_recover argument; scan: pass position; removed obsolete prepare_command (now inlined in isar_syn.ML); renamed prepare_command_failsafe to prepare_command, reports tokens; load_thy: now based on ThyEdit operations, reports tokens and spans; tuned;

Isabelle.command: inline former OuterSyntax.prepare_command; Isar.command: based on fail-safe OuterSyntax.prepare_command;

load thy_edit.ML before outer_syntax.ML;

renamed unknown_span to malformed_span; added ident; tuned;

Symbol.source/OuterLex.source: more explicit do_recover argument;

updated generated file;