Fixed whitespaces in form action. The server had a problem with handling URIs

with whitespaces and trailing slashes ('/').

resources/views/layout/forms/projects.blade.php

@@ -1,12 +1,16 @@
 @extends('layout.master')
 
 @section('subnav')
-    <a href='{{ url()->previous() }}'>Zurück</a>
+    <a href='{{ url()->previous() }}' class='btn btn-outline-primary'>Zurück</a>
 @endsection
 
 @section('content')
     <h3>@yield('title')</h3>
-    <form action="/projects/@if (!is_null($project->id)) {{ $project->id }} @endif" method='post'>
+        @if (is_null($project->id))
+            <form action='/projects' method='post'>
+        @else
+            <form action='/projects/{{$project->id}}' method='post'>
+        @endif
         @if (!is_null($project->id))
             {{ method_field('patch') }}
         @endif