Please don't use the same filename with different cases

[xuchunyang]

I.e., snippets/org-mode/html and snippets/org-mode/HTML, it causes various troubles on case-insensitive system, such as Macbook's disk, for example, it is impossible to make this repo clean

/private/tmp $ git clone https://github.com/AndreaCrotti/yasnippet-snippets.git
Cloning into 'yasnippet-snippets'...
remote: Counting objects: 5217, done.
remote: Compressing objects: 100% (91/91), done.
remote: Total 5217 (delta 30), reused 74 (delta 24), pack-reused 5102
Receiving objects: 100% (5217/5217), 783.94 KiB | 525.00 KiB/s, done.
Resolving deltas: 100% (1765/1765), done.
/private/tmp $ cd yasnippet-snippets/
/private/tmp/yasnippet-snippets $ git status -sb
## master...origin/master
 M snippets/org-mode/HTML
/private/tmp/yasnippet-snippets $ git checkout -- snippets/org-mode/HTML
/private/tmp/yasnippet-snippets $ git status -sb
## master...origin/master
 M snippets/org-mode/html
/private/tmp/yasnippet-snippets $ git checkout -- snippets/org-mode/html
/private/tmp/yasnippet-snippets $ git status -sb
## master...origin/master
 M snippets/org-mode/HTML
/private/tmp/yasnippet-snippets $

[AndreaCrotti]

Ah absolutely right @xuchunyang it happened by mistake!