Fix punctuation discrepancies in the translations

website/thaliawebsite/locale/nl/LC_MESSAGES/django.po

@@ -155,7 +155,7 @@ msgid "400: Bad request"
 msgstr "400: Verkeerde request"
 
 #: templates/403.html:4
-msgid "403: Permission denied."
+msgid "403: Permission denied"
 msgstr "403: Verboden toegang"
 
 #: templates/404.html:4
@@ -735,7 +735,7 @@ msgid "Always use 2 or 3 lines. No more, no less."
 msgstr "Er zijn maximaal 3 regels, minimaal 2."
 
 #: templates/singlepages/styleguide.html:138
-msgid "The text is vertically centered relative to the T"
+msgid "The text is vertically centered relative to the T."
 msgstr "De tekst is verticaal gecentreerd ten opzichte van de T."
 
 #: templates/singlepages/styleguide.html:139

website/thaliawebsite/templates/403.html

 {% extends "error.html" %}
 {% load i18n %}
 
-{% block error_message %}{% trans "403: Permission denied." %}<br>
+{% block error_message %}{% trans "403: Permission denied" %}<br>
 
 {{ exception }}
 {% endblock %}

website/thaliawebsite/templates/singlepages/styleguide.html

@@ -135,7 +135,7 @@
     <ul>
         <li>{% trans "The top title is <strong>always</strong> 'THALIA'." %}</li>
         <li>{% trans "Always use 2 or 3 lines. No more, no less." %}</li>
-        <li>{% trans "The text is vertically centered relative to the T" %}</li>
+        <li>{% trans "The text is vertically centered relative to the T." %}</li>
         <li>{% trans "The horizontal distance between the text lines and the T is always the same." %}</li>
     </ul>
 </p>