more robust: avoid ambiguity of contract_abbrevs;

misc tuning: more concise (or hermetic) pointfree style;

provide rewrite_term_yoyo, which is analogous to Ast.normalize;

tuned signature;

tuned names; tuned whitespace;

tuned;

misc tuning and clarification;

tuned;

misc tuning and clarification;

merged

adhoc option to disable const constraints, notably for AFP/Isabelle_DOF;

unused;

tuned signature;

proper treatment of position constraints;

more liberal ast matching, notably for case-translations in HOLCF that operate on logical consts rather than syntax consts;

more parser markup, based on position constraints for logical mixfix syntax;

more concise representation of term positions;

more robust;

tuned signature;

tuned comments;

misc tuning and clarification;

clarified concrete vs. abstract syntax: avoid translations on logical consts;

misc tuning and clarification;

clarified markers for syntax consts: avoid overlap with logical consts;

update ci mail address;

minor performance tuning;

notable performance tuning (amending a59d9b81be24 and 8976c5bc9e97): avoid costly could_beta_eta_contract, which traverses the whole term; always use Item_Net.retrieve instead, but on frozen TVars/Vars to enforce matching instead of unification;

tuned;

clarified signature;

tuned whitespace;

support multiple positions (non-empty list);

more robust syntax translation;

clarified concrete vs. abstract syntax;

more inner-syntax markup;

clarified concrete vs. abstract syntax;

clarified concrete vs. abstract syntax;

more operations;

tuned;

tuned signature;

more operations;

more accurate treatment of constraints: restrict permissive mode to output;

tuned;

tuned proofs;

clarified order of tooltips: make it less dependent on report order from ML (which differs for input vs. output);

clarified signature (see also 1de8a8b1ae79);

clarified signature;

more type information; clarified signature;

more type information;