git config doc: fix recent ASCIIDOC formatting regression

Fix a regression in 8c328561332 (blame: document --color-* options, 2021-10-08), which added an extra newline before the "+" syntax. The "Documentation/doc-diff HEAD~ HEAD" output with this applied is: [...] @@ -1815,13 +1815,13 @@ CONFIGURATION FILE specified colors if the line was introduced before the given timestamp, overwriting older timestamped colors. - + Instead of an absolute timestamp relative timestamps work as well, - e.g. 2.weeks.ago is valid to address anything older than 2 weeks. + Instead of an absolute timestamp relative timestamps work as well, + e.g. 2.weeks.ago is valid to address anything older than 2 weeks. - + It defaults to blue,12 month ago,white,1 month ago,red, which colors - everything older than one year blue, recent changes between one month - and one year old are kept white, and lines introduced within the last - month are colored red. + It defaults to blue,12 month ago,white,1 month ago,red, which + colors everything older than one year blue, recent changes between + one month and one year old are kept white, and lines introduced + within the last month are colored red. color.blame.repeatedLines Use the specified color to colorize line annotations for git blame Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>