[MERGE][Bug #48623] If versioned files match a given ignore pattern, display a warning containing the files in question

[Aaron Bentley]

Aaron Bentley has voted tweak.
Status is now: Semi-approved
Comment:
The implementation looks fine, but I'd like to see a test showing that 
the warning only lists files that match new globs, not globs that were 
already in the .bzrignore.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C1188301433.3617.0.camel%40lapbert%3E