runners/calculator: Allow unicode in results
Fixes display of °C (was "oC" before) and probably some others.
Examples:
-
=100°F->°C
is now displayed as37,77777777777778 °C
-
product()*sum()*sqrt()*integrate()
is now displayed asΠ() ⋅ Σ() ⋅ √() ⋅ ∫()
-
=x>=y
is now displayed asx ≥ y
Changes appearance and behavior a bit, might not be 100% compatible with all workflows e.g. pasting output into code. Opinions?