When I paste a very long text, it will limit the end of the string with three dots, like so:
verylongtextverylongtextvxtverylongtextverylongtextverylongtext…
This does not happen if I enable word wrap, which I don't prefer to have enabled, especially when I am pasting huge content into the editor.
Try this setting:
"editor.stopRenderingLineAfter": -1
see https://github.com/microsoft/vscode/issues/7772#issuecomment-347174463
Vscode will dim the setting as unknown but it is supposed to work anyway - fortunately I can't test ;>} A limit was set for performance reasons so disabling it may have repercussions...
I got around this by pasting the raw data into notepad, saving as whatever.txt in my target directory, and then changing the filename to whatever.json in VSC. Worked like a charm.
Of course, this is fine for a one time solution, I'm not recommending it for routine practice.
This behaviour is very confusing, but to clarify the problem - it is a rendering limitation in VS code. The full text has been pasted, so reformatting the document will render it correctly