Fix yaml syntax

base.yml

@@ -6,8 +6,8 @@
     - name: Register adm interface in adm_iface variable
       shell: set -o pipefail && grep adm /sys/class/net/*/ifalias | sed "s|/sys/class/net/||" | sed "s|/ifalias:.*||"
       register: adm_iface
-      check_mode: no
-      changed_when: True
+      check_mode: false
+      changed_when: true
       args:
         executable: /bin/bash
 

interfaces.yml

@@ -4,7 +4,7 @@
 - hosts: server
   tasks:
     - shell: "grep {{ item }} /sys/class/net/*/ifalias | sed \"s|/sys/class/net/||\" | sed \"s|/ifalias:.*||\""
-      check_mode: no
+      check_mode: false
       register: ifaces
       loop:
         - srv

roles/postfix/handlers/main.yml

@@ -1,3 +1,4 @@
+---
 - name: generate postmaps
   command: /usr/sbin/postmap {{ item }}
   loop:

upgrade.yml

@@ -21,7 +21,7 @@
 
 - hosts: owncloud-srv.adm.crans.org
   become_user: www-data
-  become: yes
+  become: true
   vars:
     # Owncloud command line interface
     occ_bin: '/var/www/owncloud/occ'