fix: Use expression in signed_number#9

FBumann merged 1 commit into

fluxopt:fix/lp-variable-bound-zerofluxopt/linopy:fix/lp-variable-bound-zerofrom

coroa:fix/lp-variable-bound-zero-expressioncoroa/linopy:fix/lp-variable-bound-zero-expressionCopy head branch name to clipboard