[1.8.x] Changed `action="."` to `action=""` in tests and docs.

`action="."` strips query parameters from the URL which is not usually what
you want. Copy-paste coding of these examples could lead to difficult to
track down bugs or even data loss if the query parameter was meant to alter
the scope of a form's POST request.

Backport of 77974a684a2e874bccd8bd9e0939ddcb367a8ed2 from master

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/templates/form_view.html b/tests/templates/form_view.html
index a23fd0b657..1ef410fb71 100644
--- a/tests/templates/form_view.html
+++ b/tests/templates/form_view.html
@@ -2,7 +2,7 @@
 {% block title %}Submit data{% endblock %}
 {% block content %}
 <h1>{{ message }}</h1>
-<form method='post' action='.'>
+<form method="post" action="">
 {% if form.errors %}
 <p class='warning'>Please correct the errors below:</p>
 {% endif %}