[Libguestfs] Note about guestfish escape sequences

[Richard W.M. Jones]

I've pushed this patch in response to a user request to
make it easier to write newlines and other characters
in guestfish:

http://git.annexia.org/?p=libguestfs.git;a=commitdiff;h=617e7f6bafa7de2303c08e1715004aae3141c389

This lets you write:

  ><fs> write /file "this is a line\n"

and have it do what you'd expect.  (With current guestfish, this
writes backslash followed by 'n' and no newline into the file)

In theory this is a change to the behaviour of guestfish, _if_ you
were relying on the above to literally write backslash-<char>.  We
never documented it either way.

Note that the change only applies to double-quoted strings.  Single
quoted strings and unquoted strings are unaffected.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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