# glue 1.6.2
* Modify a test for better forward compatibility with R.
# glue 1.6.1
* Glue Now registers its custom knitr engines in a way that is more
robust to namespace-loading edge cases that can arise during package
installation (#254).
# glue 1.6.0
* `glue()`, `glue_data()`, `glue_col()`, and `glue_data_col()` gain a
new `.literal` argument, which controls how quotes and the comment
character are treated when parsing the expression string
(#235). This is mostly useful when using a custom transformer.
* Trailing whitespace-only lines don't interfere with indentation (#247).
# glue 1.5.1
* Jennifer Bryan is now the maintainer.
* The existing custom language engines for knitr, `glue` and
`glue_sql`, are documented in a new vignette (#71). *Detail added
after release: glue now sets up registration of these engines in
`.onLoad()`.*
* `glue_col()` gives special treatment to styling functions from the
crayon package, e.g. `glue_col("{blue foo}")` "just works" now, even
if crayon is not attached (but is installed) (#241).
* Unterminated backticks trigger the same error as unterminated single
or double quotes (#237).
* `glue_sql()` collapses zero-length `DBI::SQL` object into
`DBI::SQL("NULL")` (#244 @shrektan).
# glue 1.5.0
## Breaking changes
* Long deprecated function `collapse()` has been removed (#213)
## New functions and arguments
* New `glue_sql_collapse()` function to collapse inputs and return a
`DBI::SQL()` object (#103).
* `glue()` gains a new `.comment` argument, to control the comment character (#193).
* `glue()` gains a new `.null` argument, to control the value to
replace `NULL` values with (#217, @echasnovski).
## Bugfixes and minor changes
* `sql_quote_transformer()` is now allows whitespace after the trailing `*` (#218).
* `compare_proxy.glue()` method defined so glue objects can be
compared to strings in testthat 3e without errors (#212)
* `print.glue()` no longer prints an empty newline for 0 length inputs (#214)
* Unterminated comments in glue expression now throw an error (#227, @gaborcsardi)
* Unterminated quotes in glue expressions now throw an error (#226, @gaborcsardi)
09c02f2f15