cmd/go: fix minor grammatical nit: command-line is an adjective...

while command line is a noun.

Change-Id: I9dfc2f6841d1171854857a8daa785d55afe2c5f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/167783Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/go/alldocs.go

@@ -1495,7 +1495,7 @@
 // 	GOFLAGS
 // 		A space-separated list of -flag=value settings to apply
 // 		to go commands by default, when the given flag is known by
-// 		the current command. Flags listed on the command-line
+// 		the current command. Flags listed on the command line
 // 		are applied after this list and therefore override it.
 // 	GOOS
 // 		The operating system for which to compile code.

src/cmd/go/go_test.go

@@ -5970,7 +5970,7 @@ func TestBadCgoDirectives(t *testing.T) {
 	if runtime.Compiler == "gc" {
 		tg.runFail("build", tg.path("src/x/_cgo_yy.go")) // ... but if forced, the comment is rejected
 		// Actually, today there is a separate issue that _ files named
-		// on the command-line are ignored. Once that is fixed,
+		// on the command line are ignored. Once that is fixed,
 		// we want to see the cgo_ldflag error.
 		tg.grepStderr("//go:cgo_ldflag only allowed in cgo-generated code|no Go files", "did not reject //go:cgo_ldflag directive")
 	}

src/cmd/go/internal/help/helpdoc.go

@@ -489,7 +489,7 @@ General-purpose environment variables:
 	GOFLAGS
 		A space-separated list of -flag=value settings to apply
 		to go commands by default, when the given flag is known by
-		the current command. Flags listed on the command-line
+		the current command. Flags listed on the command line
 		are applied after this list and therefore override it.
 	GOOS
 		The operating system for which to compile code.