Formats a mixtime vector as a character vector, using a glue-style format
string of {lin(...)}/{cyc(...)} tokens tailored to the vector's chronon
and cycle. If format is omitted, a sensible default is derived
automatically. See vignette("time-format-strings") for the format string
syntax.
Usage
# S4 method for class 'mt_time'
format(x, ..., attr = TRUE)