cmd/compile: remove period from "not allowed in runtime" errors

We don't punctuate compiler diagnostics.

Change-Id: I19e1f30fbf04f0d1bfe6648fae26beaf3a06ee92
Reviewed-on: https://go-review.googlesource.com/c/go/+/201077
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/closure.go

@@ -345,7 +345,7 @@ func closuredebugruntimecheck(clo *Node) {
 		}
 	}
 	if compiling_runtime && clo.Esc == EscHeap {
-		yyerrorl(clo.Pos, "heap-allocated closure, not allowed in runtime.")
+		yyerrorl(clo.Pos, "heap-allocated closure, not allowed in runtime")
 	}
 }
 

src/cmd/compile/internal/gc/esc.go

@@ -251,7 +251,7 @@ func moveToHeap(n *Node) {
 		Dump("MOVE", n)
 	}
 	if compiling_runtime {
-		yyerror("%v escapes to heap, not allowed in runtime.", n)
+		yyerror("%v escapes to heap, not allowed in runtime", n)
 	}
 	if n.Class() == PAUTOHEAP {
 		Dump("n", n)

src/cmd/compile/internal/gc/walk.go

@@ -195,7 +195,7 @@ func walkstmt(n *Node) *Node {
 		v := n.Left
 		if v.Class() == PAUTOHEAP {
 			if compiling_runtime {
-				yyerror("%v escapes to heap, not allowed in runtime.", v)
+				yyerror("%v escapes to heap, not allowed in runtime", v)
 			}
 			if prealloc[v] == nil {
 				prealloc[v] = callnew(v.Type)

test/fixedbugs/issue14999.go

@@ -7,11 +7,11 @@
 package p
 
 func f(x int) func(int) int {
-	return func(y int) int { return x + y } // ERROR "heap-allocated closure, not allowed in runtime."
+	return func(y int) int { return x + y } // ERROR "heap-allocated closure, not allowed in runtime"
 }
 
-func g(x int) func(int) int { // ERROR "x escapes to heap, not allowed in runtime."
-	return func(y int) int { // ERROR "heap-allocated closure, not allowed in runtime."
+func g(x int) func(int) int { // ERROR "x escapes to heap, not allowed in runtime"
+	return func(y int) int { // ERROR "heap-allocated closure, not allowed in runtime"
 		x += y
 		return x + y
 	}