Now, if you're not seeing the equal symbol with a slash across it, that just means you haven't installed correct font for code ligatures - FiraCode. Click here for install instructions.
With the font installed, time to activate this for VS Code, you'll have to modify your settings.json - either your users or your workspaces settings.json.
FYI, most editors and IDEs are supported except for a few; most notable are Eclipse and Sublime which are not supported yet. Huh....
To open settings.json, from the File menu choose Prefereneces, Settings or use the keyboard shortcut Ctrl +,. Add these lines and restart VS Code.
"editor.fontFamily": "Fira Code", "editor.fontSize": 14, "editor.fontLigatures": true
You might have to wrap the "Fira Code" font with extra apostrophes like
"'Fira Code'".if it doesn't work.
Read up more about code ligatures.