The code $\LEFTRIGHT\{\}{S_n}$
produces
whereras the code $\left\{ S_n \right\}$
produces
Is this a bug or feature? As the content in the braces grow larger, the visual effect of the unbalance is reduced. The above output of \LEFTRIGHT
really looks ugly to my eyes.
Note: my preamble has \usepackage[lite,subscriptcorrection,nofontinfo]{mtpro2}
\PARENS{S_N}
and\LEFTRIGHT(){S_n}
behave differently. – User Jun 16 '16 at 6:21$\left\{S_n\right\}$
is wrong to begin with; so is\LEFTRIGHT
, independently from the strange behavior. Use automatic sizing only when really necessary, which is not the case here. – egreg Jun 16 '16 at 7:25