[PATCH] Fix :var parameter for fish shell code blocks

[Elias Kueny]

0001-lisp-ob-shell.el-Adapt-the-var-header-parameter-to-f.patch
Description: Text Data

Hello,

I found an issue with fish shell code blocks, in that the `:var' parameter 
generates a command that is not syntaxically correct. Fish uses `set variable 
value' instead of `variable = value'. As a result, org-babel throws an error 
when executing the code block. This patch fixes this by adding an exception to 
org-babel-variable-assignments:shell on the model of what it already does for 
bash.

Example of code block triggering the error:
#+begin_src fish :var test
echo $test
#+end_src

Best regards,
Elias