Merge pull request #1 from jayvdb/sp

Spelling fix.

Author: chfw

templates/developer_guide.rst.jj2

@@ -10,7 +10,7 @@ In order to update test envrionment, and documentation, additional setps are
 required:
 
 #. pip install moban
-#. git clone https://github.com/pyexcel/pyexel-commons.git
+#. git clone https://github.com/pyexcel/pyexcel-commons.git
 #. make your changes in `.moban.d` directory, then issue command `moban`