Documentation: avoid stray backslashes in core tutorial
While at it:
- remove some single-quotes that were being rendered as ’\n\';
- do not escape ellipses (...) when they do not represent the
literal three characters "...". We may want to ensure the
manpages render these as three ASCII periods to make the
manual pages easier to search, but that would be a global
output generation setting, not a context-specific thing;
Reported-by: Frédéric Brière <fbriere@fbriere.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>