utf8 1.2.5

Features

• Strict argument checking for utf8_format() and utf8_print(), no extra arguments allowed.

Chore

• Replace [v]sprintf() with [v]snprintf() (#67).

• Add direct include for snprintf() (@MichaelChirico, #43).

• Add ellipsis before optional args (#74).

Documentation

• Show NEWS on CRAN page (#42, #71).

• Add pkgdown reference index.

• Use roxygen2 (#68, #69) with Markdown.

Performance

• Check interrupt every 1024 calls, avoids a division in tight loops.