Function find_split_template_token 

pub fn find_split_template_token(command: &str) -> Option<String>

Scan a built command string for an unquoted Go/Handlebars-style template token ({{ ... }}) that contains an unquoted space.

Such a token is split by the shell (and by command-stream, which mirrors shell word-splitting) into multiple argv words, so --format {{json .X}} reaches the child as --format, {{json, .X}} — exactly what a POSIX shell would do, but surprising for Go templates. Returns the offending snippet so callers can point the user at the gotcha.

Examples

use command_stream::quote::find_split_template_token;

assert_eq!(
    find_split_template_token("docker inspect --format {{json .Config.Env}}"),
    Some("{{json .Config.Env}}".to_string())
);
// Space-free or quoted tokens are not flagged.
assert_eq!(find_split_template_token("docker inspect --format {{.Id}}"), None);
assert_eq!(
    find_split_template_token("docker inspect --format '{{json .Config.Env}}'"),
    None
);