Fix shell script bug

.travis.yml

@@ -1,14 +1,14 @@
 language: python
 
-python:
+#python:
 #  - "2.6"
-  - "2.7"
+#  - "2.7"
 #  - "3.2"
 #  - "3.3"
 #  - "3.4"
 #  - "3.5"
 #  - "3.5-dev" # 3.5 development branch
-  - "3.6"
+#  - "3.6"
 #  - "3.6-dev" # 3.6 development branch
 #  - "3.7-dev" # 3.7 development branch
 #  - "nightly" # currently points to 3.7-dev

build.sh

@@ -11,7 +11,7 @@ python -m py_compile cps/uploader.py
 python -m py_compile cps/web.py
 python -m py_compile cps.py 
 fi
-f [[$PVERSION=3]]; then
+if [[ $PVERSION = 3 ]]; then
 python3.6 -m py_compile cps.py
 python3.6 -m py_compile cps/book_formats.py
 python3.6 -m py_compile cps/db.py