Replace a leading ASCII hyphen-minus (U+002D) marking a negative number with the typographic minus sign U+2212, matching matplotlib's default tick/colorbar labels. Only the sign position is converted; interior hyphens (none occur in numeric labels) and non-negative labels pass through unchanged.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=*), | intent(in) | :: | label |