Add note on unused imports and formatting

README.md

@@ -25,7 +25,7 @@ Read the [Changelog](https://github.com/Microsoft/vscode-go/blob/master/CHANGELO
 ### Code Editing
 
 - Code Snippets for quick coding
-- Format code on file save as well as format manually (using `goreturns` or `goimports` or `gofmt`)
+- Format code on file save as well as format manually (using `goreturns` or `goimports` which also remove unused imports or `gofmt`)
 - Symbol Rename (using `gorename`. Note: For Undo after rename to work in Windows you need to have `diff` tool in your path)
 - Add Imports to current file (using `gopkgs`)
 - Add/Remove Tags on struct fields (using `gomodifytags`)

package.json

@@ -657,7 +657,7 @@
         "go.formatTool": {
           "type": "string",
           "default": "goreturns",
-          "description": "Pick 'gofmt', 'goimports', 'goreturns' or 'goformat' to run on format. Not applicable when using the language server.",
+          "description": "Pick 'gofmt', 'goimports', 'goreturns' or 'goformat' to run on format. Not applicable when using the language server. Choosing 'goimport' or 'goreturns' will add missing imports and remove unused imports.",
           "scope": "resource",
           "enum": [
             "gofmt",