Update mkdocs config, fix #1914

docs/mkdocs.yml

@@ -1,30 +1,30 @@
 # Project information
-site_name: 'doccano'
-site_description: 'A Text Annotation tool for Humans'
-site_author: 'Hiroki Nakayama'
-site_url: 'https://doccano.github.io/doccano/'
+site_name: "doccano"
+site_description: "A Text Annotation tool for Humans"
+site_author: "Hiroki Nakayama"
+site_url: "https://doccano.github.io/doccano/"
 docs_dir: .
 
 # Repository
-repo_name: 'doccano/doccano'
-repo_url: 'https://github.com/doccano/doccano'
+repo_name: "doccano/doccano"
+repo_url: "https://github.com/doccano/doccano"
 
 # Copyright
-copyright: 'Copyright © 2018 - 2019 Hiroki Nakayama'
+copyright: "Copyright © 2018 - 2019 Hiroki Nakayama"
 
 theme:
-  name: 'material'
+  name: "material"
   palette:
-    primary: 'cyan'
-    accent: 'cyan'
+    primary: "cyan"
+    accent: "cyan"
   show_sidebar: true
 
 extra:
   social:
-    - icon: 'fontawesome/brands/github'
-      link: 'https://github.com/Hironsan'
-    - icon: 'fontawesome/brands/github'
-      link: 'https://twitter.com/Hironsan13'
+    - icon: "fontawesome/brands/github"
+      link: "https://github.com/Hironsan"
+    - icon: "fontawesome/brands/twitter"
+      link: "https://twitter.com/Hironsan13"
 
 plugins:
   - same-dir
@@ -36,9 +36,9 @@ nav:
   - Tutorial: tutorial.md
   - Setup cloud storage: setup_cloud_storage.md
   - Advanced:
-    - AWS HTTPS settings: advanced/aws_https_settings.md
-    - OAuth2 settings: advanced/oauth2_settings.md
-    - Auto Labeling settings: advanced/auto_labelling_config.md
+      - AWS HTTPS settings: advanced/aws_https_settings.md
+      - OAuth2 settings: advanced/oauth2_settings.md
+      - Auto Labeling settings: advanced/auto_labelling_config.md
   - Developer Guide: developer_guide.md
   - FAQ: faq.md
   - Code of Conduct: CODE_OF_CONDUCT.md