Upstream changes:
glue 1.3.1
Features
glue() now has a + method to combine strings.
Bugfixes and minor changes
glue_sql() now supports unquoting lists of Id objects.
glue_sql() now quotes characters with NAs appropriately (#115).
glue_sql() now quotes Dates appropriately (#98).
A potential protection error reported by rchk was fixed.
glue 1.3.0
Breaking changes
The evaluate() function has been removed. Changes elsewhere in glue made the implementation trivial so it was removed for clarities sake. Previous uses can be replaced by eval(parse(text = text), envir).
collapse() has been renamed to glue_collapse() to avoid namespace collisions with dplyr::collapse().
Features
compare.glue() was added, to make it easier to use glue objects in testthat::expect_equal() statements.
glue_col() and glue_data_col() functions added to display strings with color.
Bugfixes and minor changes
Glue now throws an informative error message when it cannot interpolate a function into a string (#114, @haleyjeppson & @ijlyttle).
Glue now evaluates unnamed arguments lazily with delayedAssign(), so there is no performance cost if an argument is not used. (#83, @egnha).
Fixed a bug where names in the assigned expression of an interpolation variable would conflict with the name of the variable itself (#89, @egnha).
Do not drop the glue class when subsetting (#66).
Fix glue() and collapse() always return UTF-8 encoded strings (#81, @dpprdan)
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