q_tidyloops: Tidy columns generated in loop and merge blocks.
In drsimonj/qualtricsr: Common functions used with Qualtrics surveys

Convenience function that takes a data frame and applies gather to columns ending in '(number)', which is how loop and merge data is outputted. By default, it returns key-value results as .loop and .dat

1 2	q_tidyloops(data, key_col = ".loop", value_col = ".dat", pattern = "\$[0-9]+\$$")

`data`	A data frame
`key_col`	Strings giving names of key and value columns to create.
`pattern`	character string containing a regular expression (or character string for `fixed = TRUE`) to be matched in the given character vector. Coerced by `as.character` to a character string if possible. If a character vector of length 2 or more is supplied, the first element is used with a warning. Missing values are allowed except for `regexpr` and `gregexpr`.