fix yaml syntax

Author: billryan

.travis.yml

@@ -3,53 +3,49 @@ sudo: required
 language: node_js
 
 services:
-- docker
+  - docker
 
 node_js:
-- stable
+  - stable
 
 before_install:
-- shopt -s expand_aliases
-- docker pull billryan/gitbook:latest
-- docker pull billryan/gitbook:zh-hans
-- docker pull billryan/gitbook:zh-hant
-- alias gitbook_en='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:latest
-  gitbook'
-- alias gitbook_zh_hans='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:zh-hans
-  gitbook'
-- alias gitbook_zh_hant='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:zh-hant
-  gitbook'
+  - shopt -s expand_aliases
+  - docker pull billryan/gitbook:latest
+  - docker pull billryan/gitbook:zh-hans
+  - docker pull billryan/gitbook:zh-hant
+  - alias gitbook_en='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:latest gitbook'
+  - alias gitbook_zh_hans='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:zh-hans gitbook'
+  - alias gitbook_zh_hant='docker run --rm -v "$PWD":/gitbook -p 4000:4000 billryan/gitbook:zh-hant gitbook'
 
 install:
-- echo "install gitbook dependencies..."
-- gitbook_en install
+  - gitbook_en install
 
 before_script:
 - cp LANGS.md LANGS.md.bak
 
 script:
-- echo "build English ebook"
-- sed '/\(en\/\)/! d' LANGS.md.bak > LANGS.md
-- gitbook_en pdf .
-- gitbook_en epub .
-- gitbook_en mobi .
-- echo "build Simplified Chinese ebook"
-- sed '/\(zh-hans\/\)/! d' LANGS.md.bak > LANGS.md
-- gitbook_zh_hans pdf .
-- gitbook_zh_hans epub .
-- gitbook_zh_hans mobi .
-- echo "build Traditional Chinese ebook"
-- sed '/\(zh-tw\/\)/! d' LANGS.md.bak > LANGS.md
-- gitbook_zh_hant pdf .
-- gitbook_zh_hant epub .
-- gitbook_zh_hant mobi .
-- echo "build HTML pages"
-- cp LANGS.md.bak LANGS.md
-- gitbook_en build .
-- ls -alh
+  - echo "build English ebook"
+  - sed '/\(en\/\)/! d' LANGS.md.bak > LANGS.md
+  - gitbook_en pdf .
+  - gitbook_en epub .
+  - gitbook_en mobi .
+  - echo "build Simplified Chinese ebook"
+  - sed '/\(zh-hans\/\)/! d' LANGS.md.bak > LANGS.md
+  - gitbook_zh_hans pdf .
+  - gitbook_zh_hans epub .
+  - gitbook_zh_hans mobi .
+  - echo "build Traditional Chinese ebook"
+  - sed '/\(zh-tw\/\)/! d' LANGS.md.bak > LANGS.md
+  - gitbook_zh_hant pdf .
+  - gitbook_zh_hant epub .
+  - gitbook_zh_hant mobi .
+  - echo "build HTML pages"
+  - cp LANGS.md.bak LANGS.md
+  - gitbook_en build .
+  - ls -alh
 
 before_deploy:
-- tar czvf book_html.tar.gz _book/
+  - tar czvf book_html.tar.gz _book/
 
 deploy:
   - provider: pages
@@ -65,22 +61,22 @@ deploy:
     api_key:
       secure: B/dqY0sC9I0Uu5o3HVHouX/mfLTUH/dt16IsBdm+sZQW+/YeTUTGwpx+Vl5lXpMhUoxrh60Qxt0KbnqvPqAxsPXGMH2Mhl1E5lgvMYViOGQyx9JJuuba+GWOzD+r2+XOUsqBzOCUhvC7iZbuGiWYvV2+4noAmAoKa1pO1j2yxiI=
     file:
-    - book_html.tar.gz
-    - book_en.epub
-    - book_en.mobi
-    - book_en.pdf
-    - book_zh-hans.epub
-    - book_zh-hans.mobi
-    - book_zh-hans.pdf
-    - book_zh-tw.epub
-    - book_zh-tw.mobi
-    - book_zh-tw.pdf
-  skip_cleanup: true
-  on:
-    repo: billryan/algorithm-exercise
+      - book_html.tar.gz
+      - book_en.epub
+      - book_en.mobi
+      - book_en.pdf
+      - book_zh-hans.epub
+      - book_zh-hans.mobi
+      - book_zh-hans.pdf
+      - book_zh-tw.epub
+      - book_zh-tw.mobi
+      - book_zh-tw.pdf
+    skip_cleanup: true
+    on:
+      repo: billryan/algorithm-exercise
 
 after_success:
-- ls -lh
+  - ls -lh
 
 branches:
   only: