ui: remove any combinations of CR|LF from prompt response
On Windows, we have to accept both CR+LF and LF. This patch simply makes
any trailing CRs and LFs removed from a user input instead of doing stricter
parsing, as an input must be a readable text.
$ hg init
$ echo This is file a1 > a
$ hg add a
$ hg commit -m "commit #0"
$ ls
a
$ echo This is file b1 > b
$ hg add b
$ hg commit -m "commit #1"
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
B should disappear
$ ls
a