Correct use of dedent to avoid empty lines
Correct use of dedent to avoid empty lines

When using dedent, it's usually a good idea to end the
first line with '\' so the line is combined with the
next one. Otherwise, it creates an empty line at the
beginning of string.

Signed-off-by: Luiz Carvalho <ce3f14872713a9ca19158c744f8de50732acf24f@redhat.com>

jpopelka/dockerfile-parse,jpopelka/dockerfile-parse,DBuildService/dockerfile-parse,DBuildService/dockerfile-parse