Make PipelineData helpers collect rawstreams (#969)

crates/nu-command/src/conversions/into/binary.rs

@@ -103,7 +103,7 @@ fn into_binary(
             // TODO: in the future, we may want this to stream out, converting each to bytes
             let output = stream.into_bytes()?;
             Ok(Value::Binary {
-                val: output,
+                val: output.item,
                 span: head,
             }
             .into_pipeline_data())

crates/nu-command/src/conversions/into/string.rs

@@ -154,7 +154,7 @@ fn string_helper(
             // TODO: in the future, we may want this to stream out, converting each to bytes
             let output = stream.into_string()?;
             Ok(Value::String {
-                val: output,
+                val: output.item,
                 span: head,
             }
             .into_pipeline_data())

crates/nu-command/src/strings/decode.rs

@@ -45,7 +45,7 @@ impl Command for Decode {
 
         match input {
             PipelineData::RawStream(stream, ..) => {
-                let bytes: Vec<u8> = stream.into_bytes()?;
+                let bytes: Vec<u8> = stream.into_bytes()?.item;
 
                 let encoding = match Encoding::for_label(encoding.item.as_bytes()) {
                     None => Err(ShellError::SpannedLabeledError(