Function csharp_type_name 

pub fn csharp_type_name(name: &str) -> String

Apply C# initialism handling to a name that is already in PascalCase (e.g. an IR type name).

IR type names come directly from Rust PascalCase (e.g. GraphQLRouteConfig, HttpStatus). When such names have been processed by heck::ToPascalCase they may lose initialism capitalisation for the names we explicitly preserve (e.g. GraphQLRouteConfig → GraphQlRouteConfig). This function restores them.

Examples:

• GraphQlRouteConfig → GraphQLRouteConfig
• GraphQLRouteConfig → GraphQLRouteConfig (idempotent)
• HttpStatus → HttpStatus (left alone — Http not in CSHARP_INITIALISMS)