relax data type for title

[fmichonneau]

running make lesson-check on the Spanish lessons lead to the following error messages:

"title" has wrong type in metadata (<type 'unicode'> instead of <type 'str'>)

when the title contains unicode characters such as: "Introducción a R y RStudio"

The unicode characters render fine in jekyll:

[rgaiacs]

You are using Python 2 instead of Python 3. In Python 2 you have 'str' (ASCII) and 'unicode' when in Python 3 you only have 'str' and it is Unicode.

Solution Proposal

1. Remove

   #!/usr/bin/env python
   

   from https://github.com/swcarpentry/styles/blob/gh-pages/bin/lesson_check.py because some machines have Python 2 as default when others have Python 3.

2. Replace

   @bin/lesson_check.py -s . -p ${PARSER} -r _includes/links.md
   

   with

   python3 bin/lesson_check.py -s . -p ${PARSER} -r _includes/links.md
   

   in https://github.com/swcarpentry/styles/blob/gh-pages/Makefile#L92. This will make sure that we are using Python 3.

[fmichonneau]

ha! that's it. I think on the most recent version of the template the script fails without python3 so I normally change the shebang line in the script to

#!/usr/bin/env python3

But I forgot about it this time. I'm not sure if changing the makefile or the shebang line makes a difference, but forcing python3 seems like a good approach.