all: remove newline characters after return statements

This commit is aimed at improving the readability and consistency
of the code base. Extraneous newline characters were present after
some return statements, creating unnecessary separation in the code.

Fixes #64610

Change-Id: Ic1b05bf11761c4dff22691c2f1c3755f66d341f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/548316
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

test/codegen/bits.go

@@ -382,7 +382,6 @@ func signextendAndMask8to64(a int8) (s, z uint64) {
 	// ppc64x: -"MOVB", "ANDCC\t[$]247,"
 	z = uint64(uint8(a)) & 0x3F7
 	return
-
 }
 
 // Verify zero-extended values are not sign-extended under a bit mask (#61297)
@@ -392,7 +391,6 @@ func zeroextendAndMask8to64(a int8, b int16) (x, y uint64) {
 	// ppc64x: -"MOVH\t", -"ANDCC", "MOVHZ"
 	y = uint64(b) & 0xFFFF
 	return
-
 }
 
 // Verify rotate and mask instructions, and further simplified instructions for small types

test/codegen/memcombine.go

@@ -348,7 +348,6 @@ func reassoc_load_uint32(b []byte) uint32 {
 func extrashift_load_uint32(b []byte) uint32 {
 	// amd64:`MOVL\s\([A-Z]+\)`,`SHLL\s[$]2`,-`MOV[BW]`,-`OR`
 	return uint32(b[0])<<2 | uint32(b[1])<<10 | uint32(b[2])<<18 | uint32(b[3])<<26
-
 }
 
 func outoforder_load_uint32(b []byte) uint32 {

test/codegen/noextend.go

@@ -277,7 +277,6 @@ func shouldSignEXT(x int) int64 {
 	ret += int64(int8(x & 0x1100000000000011))
 
 	return ret
-
 }
 
 func noIntermediateExtension(a, b, c uint32) uint32 {