linters: minor cosmetic updates

Make sure all blocks are named, and fix up whitespace around jinja
filters.

Change-Id: Iaaeca20d53a927fab660f45b5bb9b552a15146e2

roles/build-pdf-docs/tasks/main.yaml

@@ -18,7 +18,7 @@
 - name: Run tox with output redirected to a file
   args:
     chdir: "{{ zuul_work_dir }}"
-  environment: "{{ tox_environment|combine(tox_constraints_env|default({})) }}"
+  environment: "{{ tox_environment | combine(tox_constraints_env | default({})) }}"
   shell: |
     echo "Running {{ tox_executable }} -e {{ tox_pdf_envlist }} -vv > {{ ansible_user_dir }}/zuul-output/logs/sphinx-build-pdf.log 2>&1"
     echo "Output is redirected to a file as it tends to be quite verbose."

roles/configure-swap/tasks/root.yaml

@@ -6,7 +6,8 @@
   set_fact:
     swap_required: "{{ configure_swap_size - ansible_memory_mb['swap']['total'] | int }}"
 
-- block:
+- name: Get root filesystem
+  block:
     - name: Get root filesystem
       shell: df --output='fstype' /root | tail -1
       register: root_fs

roles/set-service-type-data-fact/tasks/main.yaml

@@ -4,7 +4,8 @@
     body_format: json
   register: service_types
 
-- block:
+- name: Set service_type_data fact
+  block:
     - name: Set service_type_data fact
       set_fact:
         service_type_data: "{{ service_types['json']['primary_service_by_project'][zuul.project.short_name] }}"