patch for Blacktext and {LCR}show -- Re: epslatex terminal spews useless output

[Petr M. <mi...@ph...>]

>> More annoying to me are all the output lines
>>  Blacktext { gsave 0 setgray } if
>>  <something>
>>  Blacktext { grestore } if

The enclosed patch moves these lines into the definitions of {M}{CLR}show, so 
that the postscript body is clean.

(I'll commit the patch unless some negative feedback is reported.)

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PM