litedown 0.7

• pkg_manual() will exclude help pages with the keyword internal (thanks, @TimTaylor, #78).

• pkg_news() will add links to Github users and issue numbers if the package is hosted on Github.

• Allow , and . in superscripts and subscripts (thanks, @janlisec, #81).

• Special characters in bibliography entries such as {\"u} can be correctly read now (thanks, @bastistician).

• Fixed a bug that inline code expressions (`{lang} expr`) cannot be correctly located when the line has leading spaces that are not meaningful.

• Deleted vignettes markdown-examples and markdown-output. They are rendered on the package site now: https://git.yihui.org/litedown/examples/test-options.html