all: fix typos and remove repeated words

Change-Id: I5f06a4ef1d827eb0fe32a8d98444142108b0d573
Reviewed-on: https://go-review.googlesource.com/c/go/+/508996
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>

src/internal/coverage/cmerge/merge.go

@@ -68,7 +68,7 @@ func (m *Merger) SaturatingAdd(dst, src uint32) uint32 {
 	return result
 }
 
-// Saturating add does a saturing addition of 'dst' and 'src',
+// Saturating add does a saturating addition of 'dst' and 'src',
 // returning added value or math.MaxUint32 plus an overflow flag.
 func SaturatingAdd(dst, src uint32) (uint32, bool) {
 	d, s := uint64(dst), uint64(src)

src/internal/diff/diff.go

@@ -76,7 +76,7 @@ func Diff(oldName string, old []byte, newName string, new []byte) []byte {
 
 		// Expand matching lines as far possible,
 		// establishing that x[start.x:end.x] == y[start.y:end.y].
-		// Note that on the first (or last) iteration we may (or definitey do)
+		// Note that on the first (or last) iteration we may (or definitely do)
 		// have an empty match: start.x==end.x and start.y==end.y.
 		start := m
 		for start.x > done.x && start.y > done.y && x[start.x-1] == y[start.y-1] {

src/internal/testenv/exec.go

@@ -163,8 +163,8 @@ func CommandContext(t testing.TB, ctx context.Context, name string, args ...stri
 			// grace periods to clean up: one for the delay between the first
 			// termination signal being sent (via the Cancel callback when the Context
 			// expires) and the process being forcibly terminated (via the WaitDelay
-			// field), and a second one for the delay becween the process being
-			// terminated and and the test logging its output for debugging.
+			// field), and a second one for the delay between the process being
+			// terminated and the test logging its output for debugging.
 			//
 			// (We want to ensure that the test process itself has enough time to
 			// log the output before it is also terminated.)

src/net/http/h2_bundle.go

@@ -8007,7 +8007,7 @@ func (cc *http2ClientConn) canTakeNewRequestLocked() bool {
 	return st.canTakeNewRequest
 }
 
-// tooIdleLocked reports whether this connection has been been sitting idle
+// tooIdleLocked reports whether this connection has been sitting idle
 // for too much wall time.
 func (cc *http2ClientConn) tooIdleLocked() bool {
 	// The Round(0) strips the monontonic clock reading so the

src/runtime/metrics.go

@@ -660,7 +660,7 @@ type cpuStatsAggregate struct {
 // compute populates the cpuStatsAggregate with values from the runtime.
 func (a *cpuStatsAggregate) compute() {
 	a.cpuStats = work.cpuStats
-	// TODO(mknyszek): Update the the CPU stats again so that we're not
+	// TODO(mknyszek): Update the CPU stats again so that we're not
 	// just relying on the STW snapshot. The issue here is that currently
 	// this will cause non-monotonicity in the "user" CPU time metric.
 	//

src/runtime/mgcscavenge.go

@@ -884,7 +884,7 @@ func fillAligned(x uint64, m uint) uint64 {
 // segment which represents a contiguous region of free and unscavenged memory.
 //
 // searchIdx indicates the page index within this chunk to start the search, but
-// note that findScavengeCandidate searches backwards through the pallocData. As a
+// note that findScavengeCandidate searches backwards through the pallocData. As
 // a result, it will return the highest scavenge candidate in address order.
 //
 // min indicates a hard minimum size and alignment for runs of pages. That is,