Channel commands: special characters, quotes and escaping

Hi list!

I'm currently playing around with the new channel support and came across something I do not fully understand. Playing around with the demoserver.py I tried to send a command to my vim-instance via feedkeys. The original command was:

:call feedkeys("ggOHello, world!\e")

From within vim this works. I tried to enter it in the server stdin as:

["ex", "..."]

and had to fight with the nested quotes. The special character "\e" is only accepted within double-quotes. So I tried to include the whole call-command in single quotes which is not accepted by the default handler leaving me with

["ex", 'call feedkeys("ggOHello, world!\e")']
> Decoding failed - discarding input

in the ch_log. A working version is

["ex", "call feedkeys(\"ggOHello, world!\\e\")"]

with a lot of escapes. I do not understand why the first solution does not work.

Tanks
Jan

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