#75 print command wider fields

[Bohdan Tkhir]

Hi!
There is limit of 16 symbols in mode name when printing value:

command: print 20log10(mag(out))
out: 20log10(mag(

Formulas are frequently used during Frequency and Phase response

I've fixed it for me , but it's temporary:

src/frontend/postcoms.c lines 281 / 288 :

(void) sprintf(buf2, "%-16.15s", v->v_name); -> change 16.15 to 16.31

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Thanks, Bohdan.