Function strip_loose_version_prefix 

pub fn strip_loose_version_prefix(s: &str) -> (&str, &str)

Strip a loose leading version prefix: v/V, optionally followed by ., :, -, or _, only when the remainder starts with a digit.

Returns (prefix, rest). When no prefix is recognized, returns ("", s).

Examples

• v1.2.3 → ("v", "1.2.3")
• V1.2.3 → ("V", "1.2.3")
• v.1.2.3 → ("v.", "1.2.3")
• v:1.2.3 → ("v:", "1.2.3")
• v-1.2.3 → ("v-", "1.2.3")
• v_1.2.3 → ("v_", "1.2.3")
• 1.2.3 → ("", "1.2.3")