mathlib

21415c8c - chore(topology/algebra/ordered): drop section vars, golf 2 proofs (#4706)

chore(topology/algebra/ordered): drop section vars, golf 2 proofs (#4706) * Explicitly specify explicit arguments instead of using section variables; * Add `continuous_min` and `continuous_max`; * Use them for `tendsto.min` and `tendsto.max`