Wrapping the commands in double quotes conflicts with various flags also using double quotes. 

For example when running `db export` you get.

`Warning: Failed to get current character set of the posts table. Reason: '"mysql --no-defaults --no-auto-rehash --batch --skip-column-names --host="localhost" --user="mat" --default-ch
aracter-set="utf8" --execute="SELECT' is not recognized as an internal or external command,
operable program or batch file.`

Removing the quotes resolves the issue.

danielbachhuber changed the title Fix proc_open commands on Windows Fix proc_open_compat util on Windows

lipemat deleted the fix-windows-commands branch

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