Problem:    filetype test fails
Solution:   Also update the scripts detection
https://github.com/vim/vim/commit/63276685f90fca8b1a0be3a6734759fa82b7be0c

Update runtime files
https://github.com/vim/vim/commit/942db23c9cb7532d68048530d749eb84ca94d0cd

Omit po files.

Update runtime files.
https://github.com/vim/vim/commit/3d1cde8a2f28dce2c82d2b2b4c5e35e6662030e0

Problem:    Fennel filetype not recognized.
Solution:   Detect with pattern and hashbang. (Chinmay Dalal, closes vim/vim#7729)
https://github.com/vim/vim/commit/402115f1c2b4d0704a822206f2e6e931e721c129

Problem:    Pascal-like filetypes not always detected.
Solution:   Improved Puppet, InstantFPC and Pascal detection. (Doug Kearns,
            closes vim/vim#7662)
https://github.com/vim/vim/commit/a0122dcd1cc9e9bb62c071a9b91426a8bce4f8d9

Problem:    Script filetype detection trips over env -S argument.
Solution:   Remove "-S" and "--ignore-environment". (closes vim/vim#5013)
            Add tests.
https://github.com/vim/vim/commit/b5e18f29fac9253b0ccf1fde5e74bff72fa1ba60

Problem:    Yaml files are only recognized by the file extension.
Solution:   Check for a line starting with "%YAML". (Jason Franklin)
https://github.com/vim/vim/commit/8eab73132838e977092d7b46f70b4ecf6274fd6a

Update runtime files
https://github.com/vim/vim/commit/790c18bfa5dfeca51749b752dddc41e60cb3fa54

Problem:    Filetype not detected for C++ header files without extension.
Solution:   Recognize the file by the Emacs file mode. (Dmitry Ilyin,
            closes vim/vim#4593)
https://github.com/vim/vim/commit/6a7af8e2dbcb768a768831d9e6355c855c215ebc

Problem:    Python2 and python3 detection not tested. (Matej Cepl)
Solution:   Add test for detecting python2 and python3.  Also detect a script
            using "js" as javascript.
https://github.com/vim/vim/commit/4bc0bed53695ac67db8d601f2a15e48e7a196688