doc: minor improvements

fix(view): avoid tabnext and wincmd for inverse search

feat: support \edef \gdef and \xdef

fix(syntax): minor adjustment of texE3Cmd

chore: minor adjustments

merge: allow passing a list to executable

feat(latexmk): allow passing a list to executable

doc: fix example for dic

fix: fixed more edge cases with get_surrounding_or_next

fix: properly handle math env delims in get_surrounding_or_next

fix: only check for math environments

feat: include second arg for envs in foldtext

merge: add macrocode as special case

test: added test files for dtx and macrocode

add macrocode as special case