templates: squeeze if/else whitespace out of section template
templates: squeeze if/else whitespace out of section template

This brings us closer to what regular asciidoctor produces,
which will be useful for comparing output in the following
steps.

mosoft521/gitscm-next,jnavila/gitscm-next,mosoft521/gitscm-next,mosoft521/gitscm-next,jnavila/gitscm-next,Mokolea/git-scm.com,jasonlong/git-scm.com,git/git-scm.com,git/git-scm.com,Mokolea/git-scm.com,jasonlong/git-scm.com,mosoft521/gitscm-next,git/git-scm.com,jasonlong/git-scm.com,jnavila/gitscm-next,jasonlong/git-scm.com,Mokolea/git-scm.com,jnavila/gitscm-next,git/git-scm.com,Mokolea/git-scm.com