allow stream outputs to be string or string[]

Author: cscheid

src/core/jupyter/jupyter.ts

@@ -1610,7 +1610,13 @@ async function mdFromCodeCell(
       if (output.output_type === "stream") {
         const stream = output as JupyterOutputStream;
         if (asis && stream.name === "stdout") {
-          md.push(stream.text.join(""));
+          let text: string[] = [];
+          if (typeof stream.text === "string") {
+            text = [stream.text];
+          } else {
+            text = stream.text;
+          }
+          md.push(text.join(""));
         } else {
           md.push(mdOutputStream(stream));
         }
@@ -1750,21 +1756,28 @@ function isMarkdown(output: JupyterOutput, options: JupyterToMarkdownOptions) {
 }
 
 function mdOutputStream(output: JupyterOutputStream) {
+  let text: string[] = [];
+  if (typeof output.text === "string") {
+    text = [output.text];
+  } else {
+    text = output.text;
+  }
+
   // trim off warning source line for notebook
   if (output.name === "stderr") {
-    if (output.text[0]) {
-      const firstLine = output.text[0].replace(
+    if (text[0]) {
+      const firstLine = text[0].replace(
         /<ipython-input.*?>:\d+:\s+/,
         "",
       );
       return mdCodeOutput(
-        [firstLine, ...output.text.slice(1)].map(colors.stripColor),
+        [firstLine, ...text.slice(1)].map(colors.stripColor),
       );
     }
   }
 
   // normal default handling
-  return mdCodeOutput(output.text.map(colors.stripColor));
+  return mdCodeOutput(text.map(colors.stripColor));
 }
 
 async function mdOutputError(

src/core/jupyter/types.ts

@@ -166,12 +166,12 @@ export interface JupyterOutput {
   metadata?: Record<string, unknown>;
   data?: Record<string, unknown>;
   name?: string;
-  text?: string[];
+  text?: string[] | string;
 }
 
 export interface JupyterOutputStream extends JupyterOutput {
   name: "stdout" | "stderr";
-  text: string[];
+  text: string[] | string;
 }
 
 export interface JupyterOutputDisplayData extends JupyterOutput {