doc: extensions: boards: suppress extra blank lines in Jinja templates

Ensure Jinja templates don't have extra blank lines in the output by
using the {% -%} syntax to suppress them.
This is not incredibly important but this helps keeps the HTML output
more readable.

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

doc/_extensions/zephyr/domain/templates/board-card.html

@@ -5,22 +5,22 @@
 
 <a
   class="board-card"
-  {% if board.doc_page %}
+  {% if board.doc_page -%}
   href="../{{ board.doc_page | replace(".rst", ".html") }}"
-  {% else %}
+  {% else -%}
   href="#"
-  {% endif %}
+  {% endif -%}
   aria-label="Open the documentation page for {{ board.full_name }}"
   data-name="{{ board.full_name}}"
   data-arch="{{ board.archs | join(" ") }}"
   data-vendor="{{ board.vendor }}"
   tabindex="0">
   <div class="vendor">{{ catalog.vendors[board.vendor] }}</div>
-  {% if board.image %}
+  {% if board.image -%}
   <img alt="A picture of the {{ board.name }} board" src="{{ board.image }}" class="picture" />
-  {% else %}
+  {% else -%}
   <div class="no-picture fa fa-microchip picture"></div>
-  {% endif %}
+  {% endif -%}
   <div class="board-name">{{ board.full_name }}</div>
   <div class="arch">{{ board.archs | join(", ") }}</div>
 </a>

doc/_extensions/zephyr/domain/templates/board-catalog.html

@@ -38,7 +38,7 @@
         <option value="" disabled selected>Select a vendor</option>
         {# Only show those vendors that have actual boards in the catalog.
            Note: as sorting per vendor name is not feasible in Jinja, the option list is sorted in the JavaScript code later #}
-        {% for vendor in (catalog.boards | items | map(attribute='1.vendor') | unique ) %}
+        {% for vendor in (catalog.boards | items | map(attribute='1.vendor') | unique ) -%}
         <option value="{{ vendor }}">{{ catalog.vendors[vendor] }}</option>
         {% endfor %}
       </select>
@@ -67,7 +67,7 @@
 <div id="nb-matches" style="text-align: center"></div>
 
 <div id="catalog">
-  {% for board_name, board in catalog.boards | items | sort(attribute='1.full_name') %}
+  {% for board_name, board in catalog.boards | items | sort(attribute='1.full_name') -%}
   {% include "board-card.html" %}
   {% endfor %}
 </div>