package.json: clean up formatter setting

Users can specify custom formatter.

Change-Id: Ia60c75682009125c1ec562e696848b265285c0ef
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/416614
Reviewed-by: Suzy Mueller <suzmue@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>

Author: hyangah

docs/settings.md

@@ -223,16 +223,8 @@ Default:
 Flags to pass to format tool (e.g. ["-s"]). Not applicable when using the language server.
 ### `go.formatTool`
 
-Not applicable when using the language server. Choosing 'goimports', 'goreturns', or 'gofumports' will add missing imports and remove unused imports.<br/>
-Allowed Options:
-
-* `default`: If the language server is enabled, format via the language server, which already supports gofmt, goimports, goreturns, and gofumpt. Otherwise, goimports.
-* `gofmt`: Formats the file according to the standard Go style.
-* `goimports`: Organizes imports and formats the file with gofmt.
-* `goformat`: Configurable gofmt, see https://github.com/mbenkmann/goformat.
-* `gofumpt`: Stricter version of gofmt, see https://github.com/mvdan/gofumpt.
-* `gofumports`: Applies gofumpt formatting and organizes imports.
-
+When the language server is enabled and one of default/gofmt/goimports/gofumpt is chosen, the language server will handle formatting. Otherwise, the extension will use the specified tool for formatting.<br/>
+Allowed Options: `default`, `gofmt`, `goimports`, `goformat`, `gofumpt`
 
 Default: `"default"`
 ### `go.generateTestsFlags`

package.json

@@ -1194,22 +1194,22 @@
         "go.formatTool": {
           "type": "string",
           "default": "default",
-          "description": "Not applicable when using the language server. Choosing 'goimports', 'goreturns', or 'gofumports' will add missing imports and remove unused imports.",
+          "description": "When the language server is enabled and one of default/gofmt/goimports/gofumpt is chosen, the language server will handle formatting. Otherwise, the extension will use the specified tool for formatting.",
           "scope": "resource",
           "enum": [
             "default",
             "gofmt",
             "goimports",
             "goformat",
-            "gofumpt",
-            "gofumports"
+            "gofumpt"
           ],
+          "additionalItems": true,
           "enumDescriptions": [
             "If the language server is enabled, format via the language server, which already supports gofmt, goimports, goreturns, and gofumpt. Otherwise, goimports.",
-            "Formats the file according to the standard Go style.",
-            "Organizes imports and formats the file with gofmt.",
+            "Formats the file according to the standard Go style. (not applicable when the language server is enabled)",
+            "Organizes imports and formats the file with gofmt. (not applicable when the language server is enabled)",
             "Configurable gofmt, see https://github.com/mbenkmann/goformat.",
-            "Stricter version of gofmt, see https://github.com/mvdan/gofumpt.",
+            "Stricter version of gofmt, see https://github.com/mvdan/gofumpt. (not applicable when the language server is enabled)",
             "Applies gofumpt formatting and organizes imports."
           ]
         },