removed some whitespace that caused issues

_includes/header.html

@@ -11,14 +11,14 @@
 		{%- for html_page in main_pages -%}
 			{%- unless html_page.url == '/' -%}
 				<a href='{{ html_page.url }}' {%- if page.title == html_page.title %} class='current'{% endif -%}>{{ html_page.title }}</a>
-			{% endunless -%}
+			{%- endunless -%}
 		{%- endfor -%}
 
 		<span class='more'>
-		{% comment -%} todo: maybe make this collapsible? {%- endcomment -%}
+		{%- comment -%} todo: maybe make this collapsible? {%- endcomment -%}
 		{%- for html_page in less_important -%}
 			<a href='{{ html_page.url }}' {%- if page.title == html_page.title %} class='current'{% endif -%}>{{ html_page.title }}</a>
-		{% endfor -%}
+		{%- endfor -%}
 		</span>
 	</span>