Aliases in the calling scope are being expanded

[danielshahaf]

Aliases defined before sourcing z-sy-h are applied. Silly proof of concept:

% alias setopt='exit 1;' 
% source zsh-syntax-highlighting.zsh 
zsh: exit 1     zsh

Possible solutions:

• Use autoload, see Consider converting to an autoload-able function #252.
• Run x=$(alias -L); unalias -m \* at the top, then eval $x at the end. This should have no side effects (unlike functions, aliases don't record the file and line number they were defined at).

Forwarded from downstream https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=842994.

[danielshahaf]

Patch: master...danielshahaf:i390-unalias-star-v1