etc/symbols
2011-06-21 wenzelm some arrow symbols from DejaVuSansMono for bsub/esub/bsup/esup;
2011-06-20 wenzelm removed obsolete font specification;
2011-06-19 wenzelm abbreviations for special control symbols;
2011-06-19 wenzelm some unicode chars for special control symbols;
2011-04-06 wenzelm more symbol abbrevs;
2010-11-08 wenzelm avoid clash of \<upharpoonright> vs. \<restriction> (cf. 666ea7e62384 and 3c49dbece0a8);
2010-05-31 wenzelm tuned abbrevs for long arrows, according to usual ASCII syntax;
2009-10-29 wenzelm removed slightly exotic symbol abbreviations for now -- achieves a coherent (unique) mapping;
2009-10-22 tbourke Fix a duplicate abbreviation || in etc/symbols.
2009-06-26 wenzelm tuned abbrevs;
2009-06-23 wenzelm fixed abbrev !! for \<And>;
2008-12-20 wenzelm removed Ids;
2008-08-24 wenzelm activated \<A>, \<a>, \<AA>, \<aa>;
2008-08-16 wenzelm tuned abbrevs;
2008-08-15 wenzelm added some abbrevs;
2008-08-15 wenzelm removed redundant "symbol" property;
2008-08-15 wenzelm Default interpretation of some Isabelle symbols.
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