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Noam Postavsky authored
Since 2017-07-22 "Signal error for symbol names with strange quotes (Bug#2967)", symbol names beginning with certain quote characters require an escaping backslash. However, the corresponding change for printing missed, so that (eq (read (prin1-to-string SYM)) SYM) does not give `t' for such symbols. * src/character.c (confusable_symbol_character_p): New function, extracted from test `read1'. * src/lread.c (read1): Use it. * src/print.c (print_object): Use it to print a backslash for symbols starting with characters that `read1' requires to be escaped. * test/src/print-tests.el (print-read-roundtrip): New test. * etc/NEWS.26: * etc/NEWS: Clarify the announcement for the earlier reader change (Bug#30217).
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