Fix linter errors

Change-Id: Iceda4b23bf5347a7de9817d212ca8db8f2befc10

doc/source/conf.py

@@ -230,7 +230,7 @@ latex_elements = {
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
     (master_doc, 'doc-' + target_name + '.tex',
-     title.replace("_", "\_"), author, 'manual'),
+     title.replace("_", r"\_"), author, 'manual'),
 ]
 
 latex_use_xindy = False

tasks/galera_install_apt.yml

@@ -48,7 +48,7 @@
     repo: "{{ galera_repo.repo }}"
     filename: "{{ galera_repo.filename | default(omit) }}"
     state: "{{ galera_repo.state }}"
-    update_cache: "no"
+    update_cache: no
   register: add_galera_repo
 
 - name: Preseed galera password(s)

tasks/galera_install_yum.yml

@@ -55,7 +55,7 @@
     force: true
   when:
     - mycnfd_stat.stat.isdir is defined
-    - mycnfd_stat.stat.isdir == True
+    - mycnfd_stat.stat.isdir
 
 # We replace the default paths for the system with symlinks to
 # the paths used by the MariaDB packages so ensure that any other

tasks/galera_install_zypper.yml

@@ -37,7 +37,7 @@
     force: true
   when:
     - mycnfd_stat.stat.isdir is defined
-    - mycnfd_stat.stat.isdir == True
+    - mycnfd_stat.stat.isdir
 
 # We replace the default paths for the system with symlinks to
 # the paths used by the MariaDB packages so ensure that any other