2014-05-24 wenzelm 2014-05-24 receovered alternative abbrevs for \<open> \<close> from 8e8243975860, to accommodate national keyboard layouts where "`" might be hard to produce;
2014-04-15 wenzelm 2014-04-15 clarified abbreviations for cartouche delimiters, to work in any context;
2014-04-06 wenzelm 2014-04-06 removed abbrev "<-" again (see c771f0fe28d1) due to conflict with important "<->" and "<-->";
2014-04-03 wenzelm 2014-04-03 more symbol abbrevs, e.g. relevant for list comprehension in HOL/List.thy or HOL/Library/Monad_Syntax.thy;
2014-02-27 wenzelm 2014-02-27 more symbol abbrevs to support HOL library maintenance;
2014-02-17 wenzelm 2014-02-17 always show PIDE positions as \<here> (0x002302 "House" from DejaVuSansMono);
2014-01-19 wenzelm 2014-01-19 group symbols;
2014-01-18 wenzelm 2014-01-18 support for nested text cartouches; clarified Symbol.is_symbolic: exclude \<open> and \<close>;
2014-01-15 wenzelm 2014-01-15 added \<newline> symbol, which is used for char/string literals in HOL;
2013-08-31 wenzelm 2013-08-31 uniform abbrevs for left/right arrows;
2013-08-31 wenzelm 2013-08-31 more abbrevs according to Isabelle/HOL ASCII replacement syntax;
2013-08-31 wenzelm 2013-08-31 added common alternative for == (its ambiguity also avoids conflict with ==>); clarified (= )= [= ]= (like <= >=); removed * (too intrusive);
2013-08-30 wenzelm 2013-08-30 single-letter abbrev does not make sense -- too many candidates;
2013-08-30 wenzelm 2013-08-30 fewer conflicts -- adhoc resolution of == vs. ==> via unicode (!) image;
2013-08-30 wenzelm 2013-08-30 more symbol abbrevs;
2013-08-30 wenzelm 2013-08-30 misc tuning -- reduce conflicts;
2013-08-30 wenzelm 2013-08-30 more symbol abbrevs, based on ProofGeneral-4.2/isar/isar-unicode-tokens.el and traditional Isabelle/HOL ASCII replacement syntax;
2013-08-28 wenzelm 2013-08-28 complete symbols only in backslash forms -- less intrusive editing, greater chance of finding escape sequence in text; complete words >= 3 characters only; discontinued short word abbrev "Un" (see also fdd6e68e29d9 and e38e80686ce5);
2013-08-25 wenzelm 2013-08-25 discontinued rendering of obsolete \<onesuperior>, \<twosuperior>, \<threesuperior>;
2013-08-18 wenzelm 2013-08-18 discontinued redundant abbreviations -- Isabelle/jEdit provides keyboard shortcuts already;
2013-08-13 wenzelm 2013-08-13 discontinued special treatment of \<^isub> and \<^isup> in rendering or editor front-end; document antiquotations: renamed term style "isub" to "sub";
2012-11-24 wenzelm 2012-11-24 more robust font for control symbols, to ensure these obscure codepoints are properly rendered;
2012-11-24 wenzelm 2012-11-24 tuned symbol groups;
2012-11-24 wenzelm 2012-11-24 tuned symbol groups;
2012-11-21 wenzelm 2012-11-21 clarified symbol groups, despite this traditional arrangement in X-symbol grid;
2012-11-20 wenzelm 2012-11-20 some grouping of Isabelle symbols, based on X-Symbol grid in PG- and a proposal by Fabian Immler;
2012-08-03 wenzelm 2012-08-03 prefer calligrapic \<RR> \<II> over \<Re> \<Im> for "screen" display (NB: official unicode defines only one version of these glyphs, unlike TeX);
2012-01-14 wenzelm 2012-01-14 discontinued default rendering for Oheimb's double-space;
2011-06-21 wenzelm 2011-06-21 some arrow symbols from DejaVuSansMono for bsub/esub/bsup/esup;
2011-06-20 wenzelm 2011-06-20 removed obsolete font specification;
2011-06-19 wenzelm 2011-06-19 abbreviations for special control symbols;
2011-06-19 wenzelm 2011-06-19 some unicode chars for special control symbols;
2011-04-06 wenzelm 2011-04-06 more symbol abbrevs;
2010-11-08 wenzelm 2010-11-08 avoid clash of \<upharpoonright> vs. \<restriction> (cf. 666ea7e62384 and 3c49dbece0a8);
2010-05-31 wenzelm 2010-05-31 tuned abbrevs for long arrows, according to usual ASCII syntax;
2009-10-29 wenzelm 2009-10-29 removed slightly exotic symbol abbreviations for now -- achieves a coherent (unique) mapping; (NB: in principle symbol abbreviations could well be ambigous);
2009-10-23 tbourke 2009-10-23 Fix a duplicate abbreviation || in etc/symbols.
2009-06-26 wenzelm 2009-06-26 tuned abbrevs;
2009-06-23 wenzelm 2009-06-23 fixed abbrev !! for \<And>;
2008-12-20 wenzelm 2008-12-20 removed Ids;
2008-08-24 wenzelm 2008-08-24 activated \<A>, \<a>, \<AA>, \<aa>; disabled \<RR>, \<II> which overlap with codepoints for \<Re>, \<Im>, remapped to unofficial place within Isabelle font;
2008-08-16 wenzelm 2008-08-16 tuned abbrevs;
2008-08-15 wenzelm 2008-08-15 added some abbrevs; \<euro>: from default font;
2008-08-15 wenzelm 2008-08-15 removed redundant "symbol" property; added "font" propery; disabled alternative letters (\<A> etc.) for now;
2008-08-15 wenzelm 2008-08-15 Default interpretation of some Isabelle symbols.