Remove tralling-spaces from preferences_repo

* apt tool sensetive for tralling spaces, and 2 files
    aka:
    cat -E mcp_saltstack
    $
    Package: libsodium18$
    Pin: release o=SaltStack$
    Pin-Priority: 50$
      $
    Package: *$
    Pin: release o=SaltStack$
    Pin-Priority: 1100$
      $
    # VS
    cat -E mcp_saltstack
    $
    Package: libsodium18$
    Pin: release o=SaltStack$
    Pin-Priority: 50$
    $
    Package: *$
    Pin: release o=SaltStack$
    Pin-Priority: 1100$
    $
    Make's different logic for apt

Change-Id: Ia5fdbe319a65b0fa017c8c065905db1837f9f982

linux/files/preferences_repo

@@ -1,18 +1,19 @@
-{%- from "linux/map.jinja" import system with context %}
-{%- set repo = system.repo[repo_name] %}
-{%- if repo.pinning is defined  %}
-  {%- for id,pin in repo.pinning|dictsort %}
-    {%- if pin.get('enabled', False) %}
+{%- from "linux/map.jinja" import system with context -%}
+{%- set repo = system.repo[repo_name] -%}
+{%- if repo.pinning is defined  -%}
+  {%- for id,pin in repo.pinning|dictsort -%}
+    {% if pin.get('enabled', False) %}
+
 Package: {{ pin.get('package','*') }}
 Pin: {{ pin.pin }}
 Pin-Priority: {{ pin.priority }}
     {%- endif %}
-  {% endfor %}
-{%- elif repo.pin is defined %}
-  {%- for pin in repo.pin %}
+  {%- endfor -%}
+{%- elif repo.pin is defined -%}
+  {%- for pin in repo.pin -%}
     {%- set package = pin.get('package', '*') %}
 Package: {{ package }}
 Pin: {{ pin.pin }}
 Pin-Priority: {{ pin.priority }}
-  {% endfor %}
-{%- endif %}
+  {%- endfor %}
+{%- endif -%}