fix: default LCC pitch to 1.27mm so pads do not overlap - #848
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quad's 0.5mm default pitch left 0.6mm-wide pads overlapping by 0.1mm along each column — a short in the emitted PCB. LCC/PLCC lead pitch is 1.27mm, so lcc now defaults `p` to 1.27mm (explicit `p` still wins). Regression tests assert no adjacent-pad overlap for lcc20 and lcc44 and the exact 1.27mm default. Fixes tscircuit#794
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Fixes #794
What
lccinherited quad's 0.5mm default pitch while defaulting pad width to 0.6mm, so adjacent pads in each column overlapped by 0.1mm — a short in the emitted PCB (reproduced: lcc44 right-column ys at 2.5/2.0/1.5 with 0.6mm pads).LCC/PLCC lead pitch is 1.27mm, so
lccnow defaultspto 1.27mm; an explicitpoverride still wins. After the fix the column reads 6.35/5.08/3.81 with 0.67mm clearance.Verification
lcc20andlcc44, and exact 1.27mm default pitch