curl / curl / 9100

75%

master: 37%

Pull #3216

travis-ci

infof: clearly indicate truncation

The internal buffer in infof() is limited to 2048 bytes of payload plus
an additional byte for NULL termination. Servers with very long error
messages can however cause truncation of the string, which currently
isn't very clear, and leads to badly formatted output.

This appends a "..." marker to the end of the string to clearly show
that it has been truncated, and adds a mandatory newline. There are
cases when infof() input doesn't require a newline, but when there is
truncation of the input is probably not one of them so forcibly add
it to avoid breaking the output.

Also include a unittest covering infof() to try and catch any bugs
introduced in this quite important function.

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