[templates] Cleanup template to improve the code generated

beat/editor/templates/algorithm.jinja2

@@ -3,6 +3,7 @@
 # experiment's settings
 {% for ref, lib in contents.uses.items() %}# Library "{{ lib }}" is available under "{{ ref }}"
 {% endfor %}
+
 class Algorithm:
     # initialise fields to store cross-input data (e.g. machines,
     # aggregations, etc.)

beat/editor/templates/database.jinja2

@@ -2,6 +2,7 @@
 # you will run this database in Environments can change based on the
 # experiment's settings
 from beat.backend.python.database import View
+
 {% for view in views %}
 class {{ view }}(View):
     # build the data for your view
@@ -24,4 +25,4 @@ class {{ view }}(View):
         # note that this object is a named tuple, with fields equivalent to
         # your keys from the objects returned from the index function
         pass
-{% endfor %}
+{% endfor -%}

beat/editor/templates/library.jinja2

@@ -2,4 +2,4 @@
 # you will run this library in Environments can change based on the
 # experiment's settings
 {% for ref, lib in uses.items() %}# Library "{{ lib }}" is available under "{{ ref }}"
-{% endfor %}
+{% endfor -%}