all: remove redundant words in comment

Change-Id: I8e6be76f24a7b1bb21cc244d5117fa60efff03b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/703317
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Sean Liao <sean@liao.dev>
Reviewed-by: Than McIntosh <thanm@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>

lib/fips140/Makefile

@@ -30,7 +30,7 @@ v%.zip:
 	go run ../../src/cmd/go/internal/fips140/mkzip.go v$*
 
 # normally mkzip refuses to overwrite an existing zip file.
-# make v1.2.3.rm removes the zip file and and unpacked
+# make v1.2.3.rm removes the zip file and unpacked
 # copy from the module cache.
 v%.rm:
 	rm -f v$*.zip

src/internal/coverage/test/counter_test.go

@@ -141,7 +141,7 @@ func TestCounterDataAppendSegment(t *testing.T) {
 
 	const numSegments = 2
 
-	// Write a counter with with multiple segments.
+	// Write a counter with multiple segments.
 	args := map[string]string{"argc": "1", "argv0": "prog.exe"}
 	allfuncs := [][]decodecounter.FuncPayload{}
 	ctrs := []uint32{}

src/net/interface_plan9.go

@@ -59,7 +59,7 @@ func readInterface(i int) (*Interface, error) {
 	fields := getFields(line)
 
 	// If the interface has no device file then we see two spaces between "device" and
-	// "maxtu" and and getFields treats the two spaces as one delimiter.
+	// "maxtu" and getFields treats the two spaces as one delimiter.
 	// Insert a gap for the missing device name.
 	// See https://go.dev/issue/72060.
 	if stringslite.HasPrefix(line, "device  maxtu ") {