internal/lsp/command: rename package generate to gen

Change-Id: If9c39b7c1e26fb0064135d5cc2a65af913f7e573
Reviewed-on: https://go-review.googlesource.com/c/tools/+/293269
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>

internal/lsp/command/gen/gen.go

@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package generate is used to generate command bindings from the gopls command
+// Package gen is used to generate command bindings from the gopls command
 // interface.
-package generate
+package gen
 
 import (
 	"bytes"

internal/lsp/command/interface_test.go

@@ -9,7 +9,7 @@ import (
 	"io/ioutil"
 	"testing"
 
-	"golang.org/x/tools/internal/lsp/command/generate"
+	"golang.org/x/tools/internal/lsp/command/gen"
 	"golang.org/x/tools/internal/testenv"
 )
 
@@ -21,7 +21,7 @@ func TestGenerated(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	generated, err := generate.Generate()
+	generated, err := gen.Generate()
 	if err != nil {
 		t.Fatal(err)
 	}