Various additions and improvements

src/libsh/error.rs

@@ -29,9 +29,8 @@ impl<'s> ShErr {
 		let msg = msg.into();
 		Self::Simple { kind, msg }
 	}
-	pub fn full(kind: ShErrKind, msg: impl Into<String>, span: Span<'s>) -> Self {
+	pub fn full(kind: ShErrKind, msg: impl Into<String>, span: ErrSpan) -> Self {
 		let msg = msg.into();
-		let span = span.into();
 		Self::Full { kind, msg, span }
 	}
 	pub fn unpack(self) -> (ShErrKind,String,Option<ErrSpan>) {

src/libsh/mod.rs

@@ -2,3 +2,4 @@ pub mod error;
 pub mod term;
 pub mod flog;
 pub mod sys;
+pub mod utils;

src/libsh/utils.rs

@@ -0,0 +1,11 @@
+use std::collections::VecDeque;
+
+pub trait VecDequeExt<T> {
+	fn to_vec(self) -> Vec<T>;
+}
+
+impl<T> VecDequeExt<T> for VecDeque<T> {
+	fn to_vec(self) -> Vec<T> {
+		self.into_iter().collect::<Vec<T>>()
+	}
+}