xfun 0.61

• is_abs_path() (and hence is_rel_path()) now tests paths purely syntactically instead of normalizing them on the filesystem. On Windows, normalizePath() could drop a trailing slash, which made a relative path like test/mydir/ be misclassified as absolute (thanks, @pitakakariki, #127).

• browser_print() now passes --no-pdf-header-footer by default when printing to PDF (with the default args), so the printed PDF no longer carries the date, page title, and file path in its header and footer.