Wrapped desc env.TERM string vals in ''

Author: adamlui

is-legacy-terminal/docs/README.md

@@ -15,7 +15,7 @@
 
 > ### _Detect whether the terminal is legacy._
 
-Checks if terminal is legacy (flicker-prone, limited rendering, etc.). On Windows, returns `True` if CMD or PowerShell ISE not hosted in modern shell. On *nix systems, returns `True` if `env.TERM` is `dumb` or `unknown` (indicating a very basic terminal).
+Checks if terminal is legacy (flicker-prone, limited rendering, etc.). On Windows, returns `True` if CMD or PowerShell ISE not hosted in modern shell. On *nix systems, returns `True` if `env.TERM` is `'dumb'` or `'unknown'` (indicating a very basic terminal).
 
 
 ## ⚡ Installation