all: remove repetitive words

Change-Id: Idad45a4c8352116b68eca172329214dbfb89b294
Reviewed-on: https://go-review.googlesource.com/c/tools/+/509696
Run-TryBot: shuang cui <imcusg@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>

cmd/godoc/main.go

@@ -226,7 +226,7 @@ func main() {
 
 		} else {
 			// Try to download dependencies that are not in the module cache in order to
-			// to show their documentation.
+			// show their documentation.
 			// This may fail if module downloading is disallowed (GOPROXY=off) or due to
 			// limited connectivity, in which case we print errors to stderr and show
 			// documentation only for packages that are available.

go/analysis/passes/atomicalign/atomicalign.go

@@ -75,8 +75,8 @@ func run(pass *analysis.Pass) (interface{}, error) {
 
 func check64BitAlignment(pass *analysis.Pass, funcName string, arg ast.Expr) {
 	// Checks the argument is made of the address operator (&) applied to
-	// to a struct field (as opposed to a variable as the first word of
+	// a struct field (as opposed to a variable as the first word of
-	// uint64 and int64 variables can be relied upon to be 64-bit aligned.
+	// uint64 and int64 variables can be relied upon to be 64-bit aligned).
 	unary, ok := arg.(*ast.UnaryExpr)
 	if !ok || unary.Op != token.AND {
 		return

go/callgraph/vta/internal/trie/builder.go

@@ -378,7 +378,7 @@ func (b *Builder) merge(c Collision, lhs, rhs node) node {
 		}
 	}
 
-	// Last remaining case is branch branch merging.
+	// Last remaining case is branch merging.
 	// For brevity, we adopt the Okasaki and Gill naming conventions
 	// for branching and prefixes.
 	s, t := lhs.(*branch), rhs.(*branch)
@@ -472,7 +472,7 @@ func (b *Builder) intersect(c Collision, l, r node) node {
 			// fallthrough
 		}
 	}
-	// Last remaining case is branch branch intersection.
+	// Last remaining case is branch intersection.
 	s, t := l.(*branch), r.(*branch)
 	p, m := s.prefix, s.branching
 	q, n := t.prefix, t.branching

go/packages/packages.go

@@ -630,7 +630,7 @@ func newLoader(cfg *Config) *loader {
 	return ld
 }
 
-// refine connects the supplied packages into a graph and then adds type and
+// refine connects the supplied packages into a graph and then adds type
 // and syntax information as requested by the LoadMode.
 func (ld *loader) refine(response *driverResponse) ([]*Package, error) {
 	roots := response.Roots

go/ssa/builder.go

@@ -950,7 +950,7 @@ func (b *builder) stmtList(fn *Function, list []ast.Stmt) {
 // returns the effective receiver after applying the implicit field
 // selections of sel.
 //
-// wantAddr requests that the result is an an address.  If
+// wantAddr requests that the result is an address.  If
 // !sel.indirect, this may require that e be built in addr() mode; it
 // must thus be addressable.
 //

go/ssa/emit.go

@@ -101,7 +101,7 @@ func emitArith(f *Function, op token.Token, x, y Value, t types.Type, pos token.
 }
 
 // emitCompare emits to f code compute the boolean result of
-// comparison comparison 'x op y'.
+// comparison 'x op y'.
 func emitCompare(f *Function, op token.Token, x, y Value, pos token.Pos) Value {
 	xt := x.Type().Underlying()
 	yt := y.Type().Underlying()

godoc/index.go

@@ -628,7 +628,7 @@ func (x *Indexer) addFile(f vfs.ReadSeekCloser, filename string, goFile bool) (f
 
 	// The file set's base offset and x.sources size must be in lock-step;
 	// this permits the direct mapping of suffix array lookup results to
-	// to corresponding Pos values.
+	// corresponding Pos values.
 	//
 	// When a file is added to the file set, its offset base increases by
 	// the size of the file + 1; and the initial base offset is 1. Add an

godoc/versions.go

@@ -72,7 +72,7 @@ type versionedRow struct {
 	structName string // for struct fields, the outer struct name
 }
 
-// versionParser parses $GOROOT/api/go*.txt files and stores them in in its rows field.
+// versionParser parses $GOROOT/api/go*.txt files and stores them in its rows field.
 type versionParser struct {
 	res apiVersions // initialized lazily
 }

godoc/vfs/emptyvfs.go

@@ -32,7 +32,7 @@ func (e *emptyVFS) Open(path string) (ReadSeekCloser, error) {
 	return nil, os.ErrNotExist
 }
 
-// Stat returns os.FileInfo for an empty directory if the path is
+// Stat returns os.FileInfo for an empty directory if the path
 // is root "/" or error. os.FileInfo is implemented by emptyVFS
 func (e *emptyVFS) Stat(path string) (os.FileInfo, error) {
 	if path == "/" {

gopls/internal/lsp/diagnostics.go

@@ -263,7 +263,7 @@ func (s *Server) diagnose(ctx context.Context, snapshot source.Snapshot, analyze
 	// Wait for a free diagnostics slot.
 	// TODO(adonovan): opt: shouldn't it be the analysis implementation's
 	// job to de-dup and limit resource consumption? In any case this
-	// this function spends most its time waiting for awaitLoaded, at
+	// function spends most its time waiting for awaitLoaded, at
 	// least initially.
 	select {
 	case <-ctx.Done():

gopls/internal/lsp/fake/sandbox.go

@@ -267,7 +267,7 @@ func (sb *Sandbox) RunGoCommand(ctx context.Context, dir, verb string, args, env
 		return fmt.Errorf("go command failed (stdout: %s) (stderr: %s): %v", stdout.String(), stderr.String(), err)
 	}
 	// Since running a go command may result in changes to workspace files,
-	// check if we need to send any any "watched" file events.
+	// check if we need to send any "watched" file events.
 	//
 	// TODO(rFindley): this side-effect can impact the usability of the sandbox
 	//                 for benchmarks. Consider refactoring.

gopls/internal/lsp/filecache/filecache.go

@@ -302,7 +302,7 @@ func SetBudget(new int64) (old int64) {
 // In particular, each gopls process attempts to garbage collect
 // the entire gopls directory so that newer binaries can clean up
 // after older ones: in the development cycle especially, new
-// new versions may be created frequently.
+// versions may be created frequently.
 func filename(kind string, key [32]byte) (string, error) {
 	base := fmt.Sprintf("%x-%s", key, kind)
 	dir, err := getCacheDir()

gopls/internal/lsp/server.go

@@ -25,7 +25,7 @@ import (
 const concurrentAnalyses = 1
 
 // NewServer creates an LSP server and binds it to handle incoming client
-// messages on on the supplied stream.
+// messages on the supplied stream.
 func NewServer(session *cache.Session, client protocol.ClientCloser) *Server {
 	return &Server{
 		diagnostics:           map[span.URI]*fileReports{},

gopls/internal/lsp/source/inlay_hint.go

@@ -157,7 +157,7 @@ func parameterNames(node ast.Node, m *protocol.Mapper, tf *token.File, info *typ
 		if param.Name() == "" {
 			continue
 		}
-		// Skip the parameter name hint if the arg matches the
+		// Skip the parameter name hint if the arg matches
 		// the parameter name.
 		if i, ok := v.(*ast.Ident); ok && i.Name == param.Name() {
 			continue

gopls/internal/lsp/source/references.go

@@ -332,7 +332,7 @@ func ordinaryReferences(ctx context.Context, snapshot Snapshot, uri span.URI, pp
 
 		// The scope is the union of rdeps of each variant.
 		// (Each set is disjoint so there's no benefit to
-		// to combining the metadata graph traversals.)
+		// combining the metadata graph traversals.)
 		for _, m := range variants {
 			if err := addRdeps(m.ID, transitive); err != nil {
 				return nil, err

gopls/internal/lsp/source/rename.go

@@ -774,7 +774,7 @@ func renamePackage(ctx context.Context, s Snapshot, f FileHandle, newName Packag
 	edits := make(map[span.URI][]diff.Edit)
 	for _, m := range allMetadata {
 		// Special case: x_test packages for the renamed package will not have the
-		// package path as as a dir prefix, but still need their package clauses
+		// package path as a dir prefix, but still need their package clauses
 		// renamed.
 		if m.PkgPath == oldPkgPath+"_test" {
 			if err := renamePackageClause(ctx, m, s, newName+"_test", edits); err != nil {

internal/diff/diff.go

@@ -153,7 +153,7 @@ expand:
 // expandEdit returns edit expanded to complete whole lines.
 func expandEdit(edit Edit, src string) Edit {
 	// Expand start left to start of line.
-	// (delta is the zero-based column number of of start.)
+	// (delta is the zero-based column number of start.)
 	start := edit.Start
 	if delta := start - 1 - strings.LastIndex(src[:start], "\n"); delta > 0 {
 		edit.Start -= delta

internal/gocommand/invoke.go

@@ -319,7 +319,7 @@ func runCmdContext(ctx context.Context, cmd *exec.Cmd) (err error) {
 					// Per https://pkg.go.dev/os#File.Close, the call to stdoutR.Close
 					// should cause the Read call in io.Copy to unblock and return
 					// immediately, but we still need to receive from stdoutErr to confirm
-					// that that has happened.
+					// that it has happened.
 					<-stdoutErr
 					err2 = ctx.Err()
 				}
@@ -333,7 +333,7 @@ func runCmdContext(ctx context.Context, cmd *exec.Cmd) (err error) {
 			// one goroutine at a time will call Write.”
 			//
 			// Since we're starting a goroutine that writes to cmd.Stdout, we must
-			// also update cmd.Stderr so that that still holds.
+			// also update cmd.Stderr so that it still holds.
 			func() {
 				defer func() { recover() }()
 				if cmd.Stderr == prevStdout {

internal/imports/mod_cache.go

@@ -12,7 +12,7 @@ import (
 	"golang.org/x/tools/internal/gopathwalk"
 )
 
-// To find packages to import, the resolver needs to know about all of the
+// To find packages to import, the resolver needs to know about all of
 // the packages that could be imported. This includes packages that are
 // already in modules that are in (1) the current module, (2) replace targets,
 // and (3) packages in the module cache. Packages in (1) and (2) may change over

internal/jsonrpc2_v2/serve.go

@@ -104,7 +104,7 @@ func (s *Server) run(ctx context.Context) {
 		rwc, err := s.listener.Accept(ctx)
 		if err != nil {
 			// Only Shutdown closes the listener. If we get an error after Shutdown is
-			// called, assume that that was the cause and don't report the error;
+			// called, assume that was the cause and don't report the error;
 			// otherwise, report the error in case it is unexpected.
 			if atomic.LoadInt32(&s.closing) == 0 {
 				s.async.setError(err)

internal/persistent/map.go

@@ -242,7 +242,7 @@ func union(first, second *mapNode, less func(a, b interface{}) bool, overwrite b
 //
 // split(n:-0) (left:+1, mid:+1, right:+1)
 // Split borrows n without affecting its refcount, and returns three
-// new references that that caller is expected to call decref.
+// new references that the caller is expected to call decref.
 func split(n *mapNode, key interface{}, less func(a, b interface{}) bool, requireMid bool) (left, mid, right *mapNode) {
 	if n == nil {
 		return nil, nil, nil