Add news bullet

Author: hadley

NEWS.md

@@ -1,5 +1,6 @@
 # testthat (development version)
 
+* The hints generated by `expect_snapshot()` and `expect_snapshot_file()` now include the path to the package, if its not in the current working directory (#1577).
 * `expect_snapshot_file()` now clearly errors if the `path` doesnt exist (#2191).
 * `expect_snapshot_file()` now considers `.json` to be a text file (#1593).
 * `expect_snapshot_file()` now shows differences for text files (#1593).