all: fix typos

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	codespell -S .cache,vendor -L ot,ba,fo,unparseable -w

Note that the misspelled "unparseable" comes from the
github.com/protocolbuffers/protobuf, where it is explicitly ignored
(see [1] and some explanation at [2]), so we ignore it here, too.

[1] https://github.com/protocolbuffers/protobuf/pull/7752
[2] https://github.com/protocolbuffers/protobuf/pull/7751#discussion_r460170422

Change-Id: Ie1ca705db4f11df8ec8b22fdc22b6a6ee667ae5b
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/406845
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Lasse Folger <lassefolger@google.com>

cmd/protoc-gen-go/internal_gengo/well_known_types.go

@@ -972,7 +972,7 @@ func genMessageKnownFunctions(g *protogen.GeneratedFile, f *fileInfo, m *message
 		g.P("			// Identify the next message to search within.")
 		g.P("			md = fd.Message() // may be nil")
 		g.P()
-		g.P("			// Repeated fields are only allowed at the last postion.")
+		g.P("			// Repeated fields are only allowed at the last position.")
 		g.P("			if fd.IsList() || fd.IsMap() {")
 		g.P("				md = nil")
 		g.P("			}")

compiler/protogen/protogen.go

@@ -472,7 +472,7 @@ func newFile(gen *Plugin, p *descriptorpb.FileDescriptorProto, packageName GoPac
 }
 
 // splitImportPathAndPackageName splits off the optional Go package name
-// from the Go import path when seperated by a ';' delimiter.
+// from the Go import path when separated by a ';' delimiter.
 func splitImportPathAndPackageName(s string) (GoImportPath, GoPackageName) {
 	if i := strings.Index(s, ";"); i >= 0 {
 		return GoImportPath(s[:i]), GoPackageName(s[i+1:])

encoding/bench_test.go

@@ -16,7 +16,7 @@ import (
 )
 
 // The results of these microbenchmarks are unlikely to correspond well
-// to real world peformance. They are mainly useful as a quick check to
+// to real world performance. They are mainly useful as a quick check to
 // detect unexpected regressions and for profiling specific cases.
 
 const maxRecurseLevel = 3

integration_test.go

@@ -124,7 +124,7 @@ func Test(t *testing.T) {
 			runGo("ProtocGenGo", command{Dir: "cmd/protoc-gen-go/testdata"}, "go", "test")
 			runGo("Conformance", command{Dir: "internal/conformance"}, "go", "test", "-execute")
 
-			// Only run the 32-bit compatability tests for Linux;
+			// Only run the 32-bit compatibility tests for Linux;
 			// avoid Darwin since 10.15 dropped support i386 code execution.
 			if runtime.GOOS == "linux" {
 				runGo("Arch32Bit", command{Dir: workDir, Env: append(os.Environ(), "GOARCH=386")}, "go", "test", "./...")

internal/encoding/json/bench_test.go

@@ -19,7 +19,7 @@ func BenchmarkFloat(b *testing.B) {
 			b.Fatal(err)
 		}
 		if _, ok := val.Float(64); !ok {
-			b.Fatal("not a flaot")
+			b.Fatal("not a float")
 		}
 	}
 }

internal/filedesc/build_test.go

@@ -59,7 +59,7 @@ func TestInit(t *testing.T) {
 
 		// TODO: Test oneof and extension options. Testing these requires extending the
 		// options messages (because they contain no user-settable fields), but importing
-		// decriptor.proto from test.proto currently causes an import cycle. Add test
+		// descriptor.proto from test.proto currently causes an import cycle. Add test
 		// cases when that import cycle has been fixed.
 		descPkg.Append("OneofDescriptorProto.options"): true,
 	}

internal/order/range.go

@@ -25,7 +25,7 @@ type (
 	// FieldRnger is an interface for visiting all fields in a message.
 	// The protoreflect.Message type implements this interface.
 	FieldRanger interface{ Range(VisitField) }
-	// VisitField is called everytime a message field is visited.
+	// VisitField is called every time a message field is visited.
 	VisitField = func(pref.FieldDescriptor, pref.Value) bool
 )
 
@@ -76,7 +76,7 @@ type (
 	// EntryRanger is an interface for visiting all fields in a message.
 	// The protoreflect.Map type implements this interface.
 	EntryRanger interface{ Range(VisitEntry) }
-	// VisitEntry is called everytime a map entry is visited.
+	// VisitEntry is called every time a map entry is visited.
 	VisitEntry = func(pref.MapKey, pref.Value) bool
 )
 

proto/bench_test.go

@@ -14,7 +14,7 @@ import (
 )
 
 // The results of these microbenchmarks are unlikely to correspond well
-// to real world peformance. They are mainly useful as a quick check to
+// to real world performance. They are mainly useful as a quick check to
 // detect unexpected regressions and for profiling specific cases.
 
 var (

testing/protocmp/xform.go

@@ -224,7 +224,7 @@ func Transform(...option) cmp.Option {
 }
 
 func isMessageType(t reflect.Type) bool {
-	// Avoid tranforming the Message itself.
+	// Avoid transforming the Message itself.
 	if t == reflect.TypeOf(Message(nil)) || t == reflect.TypeOf((*Message)(nil)) {
 		return false
 	}

testing/prototest/message.go

@@ -25,7 +25,7 @@ import (
 // TODO: Test invalid field descriptors or oneof descriptors.
 // TODO: This should test the functionality that can be provided by fast-paths.
 
-// Message tests a message implemention.
+// Message tests a message implementation.
 type Message struct {
 	// Resolver is used to determine the list of extension fields to test with.
 	// If nil, this defaults to using protoregistry.GlobalTypes.

types/known/fieldmaskpb/field_mask.pb.go

@@ -394,7 +394,7 @@ func numValidPaths(m proto.Message, paths []string) int {
 			// Identify the next message to search within.
 			md = fd.Message() // may be nil
 
-			// Repeated fields are only allowed at the last postion.
+			// Repeated fields are only allowed at the last position.
 			if fd.IsList() || fd.IsMap() {
 				md = nil
 			}