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IsPortableEnvName

Mountain::Environment::Utility::EnhanceShellEnvironment

Function IsPortableEnvName 

Source 
fn IsPortableEnvName(Name: &str) -> bool
Expand description

Reject keys with characters outside the portable POSIX set so a hostile rc-file can’t sneak shell metacharacters into our env via a crafted Key= line. Standard env-var names are [A-Za-z_][A-Za-z0-9_]*; anything else is dropped silently.