Add terraform workspace to prompt

themes/powerline/README.md

@@ -67,6 +67,7 @@ The contents of the prompt can be "reordered", all the "segments" (every piece o
 * `node` - Current node version (only `nvm` is supported)
 * `scm` - Version control information, `git`
 * `user_info` - Current user
+* `terraform` - Current terraform workspace
 * `wd` - Working directory, like `cwd` but doesn't show the full folder
   hierarchy, only the directory you're currently in.
 * `shlvl` - Show the current shell level (based on `SHLVL` environment variable), but only if you are not in root shell