Fix copy on read only text (#4169)

* Fix copy from readonly code

* Fix xmp text

Author: rchiodo

news/2 Fixes/4168.md

@@ -0,0 +1 @@
+Fix ctrl+c to work in code that has already been entered

src/datascience-ui/history-react/cell.tsx

@@ -345,7 +345,7 @@ export class Cell extends React.Component<ICellProps> {
             // Output may have goofy ascii colorization chars in it. Try
             // colorizing if we don't have html that needs <xmp> around it (ex. <type ='string'>)
             try {
-                if (formatted.includes('<')) {
+                if (!formatted.includes('<')) {
                     const converter = new ansiToHtml();
                     const html = converter.toHtml(formatted);
                     copy.data = {

src/datascience-ui/history-react/code.tsx

@@ -90,7 +90,7 @@ export class Code extends React.Component<ICodeProps, ICodeState> {
                             theme: `${this.props.codeTheme} default`,
                             mode: 'python',
                             cursorBlinkRate: -1,
-                            readOnly: readOnly ? 'nocursor' : false,
+                            readOnly: readOnly ? true : false,
                             lineWrapping: true
                         }
                     }