fix tox

Author: felix314159

tox.ini

@@ -87,8 +87,7 @@ commands_pre =
             curl -L -o {envdir}/bin/solc https://github.com/ethereum/solidity/releases/download/v0.8.24/solc-macos; \
         else \
             curl -L -o {envdir}/bin/solc https://github.com/ethereum/solidity/releases/download/v0.8.24/solc-static-linux; \
-        fi; \
-    fi'
+        fi;'
     # Make it executable
     chmod +x {envdir}/bin/solc
     # Verify it works