front matter: hyperlink permalink for brevity

Merges #114

content/00.front-matter.md

@@ -10,14 +10,15 @@ _A DOI-citable version of this manuscript is available at <https://doi.org/DOI_H
 
 {## Template to insert build date and source ##}
 <small><em>
-This manuscript was automatically generated
+This manuscript
 {% if ci_source is defined -%}
-from [{{ci_source.repo_slug}}@{{ci_source.commit | truncate(length=7, end='', leeway=0)}}](https://github.com/{{ci_source.repo_slug}}/tree/{{ci_source.commit}})
+([permalink](https://{{ci_source.repo_owner}}.github.io/{{ci_source.repo_name}}/v/{{ci_source.commit}}/))
 {% endif -%}
-on {{date}}.
+was automatically generated
 {% if ci_source is defined -%}
-The permalink for this manuscript version is <https://{{ci_source.repo_owner}}.github.io/{{ci_source.repo_name}}/v/{{ci_source.commit}}/>.
+from [{{ci_source.repo_slug}}@{{ci_source.commit | truncate(length=7, end='', leeway=0)}}](https://github.com/{{ci_source.repo_slug}}/tree/{{ci_source.commit}})
 {% endif -%}
+on {{date}}.
 </em></small>
 
 ## Authors