[randy3k]

Related to #380 and #530.

This mirrors current styler behavior for calls with a trailing multiline string to minimize migration churn when transitioning existing codebases from styler to air.

Specifically, it treats multiline strings (including raw strings) as groupable in argument_is_groupable() so their opening and closing quotes can hug the surrounding call arguments without forcing all arguments to break out onto new lines.

Because is_hugging_call() delegates to argument_is_groupable(), this also allows nested single-argument calls with a trailing multiline string (such as sql(glue("..."))) to hug ( and ). Persistent line breaks after ( and comments on the trailing argument continue to prevent grouping via has_persistent_line_break() and should_group_last_argument().

Examples

# Single unnamed multiline string
fn("
  this
  that
")

# Trailing multiline string in a multi-argument call
DBI::dbGetQuery(con, "
  SELECT *
  FROM table
")

# Named trailing multiline string
fn(arg, name = "multiline
  string")

# Nested hugging calls
sql(glue("(
  SELECT *
  FROM table
)"))

# Persistent line break after `(` is preserved
fn(
  "this
  that"
)