Error: theme/index.html:57: function "default" not defined

[kradon86]

Hello,
A clean by the book deployment on a up-to-date server throws the following errors. Seems related to this change.

ERROR: 2018/08/01 16:05:20 template.go:350: template: theme/index.html:57: function "default" not defined
ERROR: 2018/08/01 16:05:20 general.go:222: Error while rendering homepage: html/template: "theme/index.html" is an incomplete template

hugo-identity-theme/layouts/index.html

Line 57 in ca4e10d

<li><a href="{{ .link }}" class="{{ .icon }}" target="{{ .target | default "_self" }}">{{ .title }}</a></li>