meshio
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:bug: (_nastran): fix converting float values into nastran string
if a float value is negative and preicise, then the constraint
(len(out)<=len) can not be satisfied. Example: -0.09466145283577683.
fix this using dynamic precision setting.
when convert float -0.09466145283577683, the length of variable out
is 17 > 16.
after the bug-fix, the length will be 16.