[9fans] p9p mk(1) syntax

[dexen deVries]

in p9p mk, this works as expected:
foo = `{echo bar}

but the following does not -- rc(1) indicates syntax error:
foo = `{echo `{echo bar}}


strace indicates that mk(1) passes input to rc(1) with no closing braces at 
all.


i'm using MKSHELL = rc.

-- 
dexen deVries

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Take care of the luxuries and the necessities will take care of themselves.
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