improved accounting for dead variables when naming set functions (refines d71c2737ee21)

added explicit killing

more precise error message

reuse same parser for '(co)datatype(_new)' as for 'bnf_decl'

tuned message;

tuned proofs;

tuned whitespace;

unused;

clarified semantic completion: retain kind.full_name as official item name for history; misc tuning;

try explicit semantic completion before syntax completion;

more explicit Completion.Item.range, independently of caret;

tuned whitespace;

clarified stretch_point_range wrt. UTF-16 surrogates; tuned;

tuned;

some rendering of completion range; tuned;

clarified completion names; tuned signature;

NEWS and documentation, including correction of long-overseen "*"

regenerated

keep only identifiers public which are explicitly requested or demanded by dependencies

explicit option for "open" code generation

tuned

more fine-grain notion of export

tuned

formal markup for public ingredients

tuned

dropped long-unused option

avoid ad-hoc patching of generated code

tuned proofs;

support for semantic completion on Scala side;

clarified module location (again, see 763d35697338);

support for completion within the formal context; tuned signature;

removed remains of old experiment (see b933142e02d0);

removed dead code; more complete patterns;

tuned signature;

NEWS;

tuned comment;

refined language context: antiquotes; support default completions, with move of caret position; tuned signature;

tuned proofs;

merged

more standard theory name;

tuned;

tuned whitespace; tuned names;

proper ML structure with signature;

reduced ML warnings;

simultaneous mapping of strongly connected components

dropped dead code

more symbols;

merged

improved completion based on context information;

more markup -- complete symbols within antiquotation, notably with broken arguments;

eliminated somewhat pointless elements index (see also f793dd5d84b2, 2b7fed8c9c4ac): less memory and more speed (avoid linear "exists" of 19dffae33cde);

tuned signature -- avoid redundancy and confusion of flags;

tuned signature;

more general / abstract Command.Markups, with separate index for status elements; slightly faster Rendering.overview_color;

tuned signature -- avoid obscure default arguments;

more lightweight Rendering;