chore: Use the common parser root check method

Signed-off-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>

src/file/format/gura.rs

@@ -2,6 +2,7 @@ use std::error::Error;
 
 use gura::GuraType;
 
+use crate::format;
 use crate::map::Map;
 use crate::value::{Value, ValueKind};
 
@@ -10,11 +11,7 @@ pub fn parse(
     text: &str,
 ) -> Result<Map<String, Value>, Box<dyn Error + Send + Sync>> {
     let value = from_gura_value(uri, gura::parse(text).unwrap());
-    match value.kind {
-        ValueKind::Table(map) => Ok(map),
-
-        _ => Ok(Map::new()),
-    }
+    format::extract_root_table(uri, value)
 }
 
 fn from_gura_value(uri: Option<&String>, value: GuraType) -> Value {