bug#9022: 23.2.1; Quail input breaks delete-char binding behaviour (Linux)

[David Aspinall]

1. switch to *scratch* 
2. M-x set-input-method RET TeX RET 
3. Type "xyz", C-a 
3. Type "\alpha" (see alpha, verify TeX input method) 
4. Type "\a" then DELETE (delete key, not backspace).

At step 4, the delete operates as backward delete, not forward delete.

See also downstream report

http://proofgeneral.inf.ed.ac.uk/trac/ticket/405

Thanks,

- David

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