cmd/vet: shorten diagnostic about suspicious struct tag spaces

Change-Id: I112d0164df6abd9ca1df287376cf3605268385df
Reviewed-on: https://go-review.googlesource.com/78116
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/vet/structtag.go

@@ -115,7 +115,7 @@ var (
 	errTagSyntax      = errors.New("bad syntax for struct tag pair")
 	errTagKeySyntax   = errors.New("bad syntax for struct tag key")
 	errTagValueSyntax = errors.New("bad syntax for struct tag value")
-	errTagValueSpace  = errors.New("suspicious space found in struct tag value")
+	errTagValueSpace  = errors.New("suspicious space in struct tag value")
 	errTagSpace       = errors.New("key:\"value\" pairs not separated by spaces")
 )
 

src/cmd/vet/testdata/structtag.go

@@ -83,19 +83,19 @@ type DuplicateJSONFields struct {
 
 type UnexpectedSpacetest struct {
 	A int `json:"a,omitempty"`
-	B int `json:"b, omitempty"` // ERROR "suspicious space found in struct tag value"
+	B int `json:"b, omitempty"` // ERROR "suspicious space in struct tag value"
 	C int `json:"c ,omitempty"`
-	D int `json:"d,omitempty, string"` // ERROR "suspicious space found in struct tag value"
+	D int `json:"d,omitempty, string"` // ERROR "suspicious space in struct tag value"
 	E int `xml:"e local"`
-	F int `xml:"f "`                 // ERROR "suspicious space found in struct tag value"
-	G int `xml:" g"`                 // ERROR "suspicious space found in struct tag value"
-	H int `xml:"h ,omitempty"`       // ERROR "suspicious space found in struct tag value"
-	I int `xml:"i, omitempty"`       // ERROR "suspicious space found in struct tag value"
-	J int `xml:"j local ,omitempty"` // ERROR "suspicious space found in struct tag value"
-	K int `xml:"k local, omitempty"` // ERROR "suspicious space found in struct tag value"
-	L int `xml:" l local,omitempty"` // ERROR "suspicious space found in struct tag value"
-	M int `xml:"m  local,omitempty"` // ERROR "suspicious space found in struct tag value"
-	N int `xml:" "`                  // ERROR "suspicious space found in struct tag value"
+	F int `xml:"f "`                 // ERROR "suspicious space in struct tag value"
+	G int `xml:" g"`                 // ERROR "suspicious space in struct tag value"
+	H int `xml:"h ,omitempty"`       // ERROR "suspicious space in struct tag value"
+	I int `xml:"i, omitempty"`       // ERROR "suspicious space in struct tag value"
+	J int `xml:"j local ,omitempty"` // ERROR "suspicious space in struct tag value"
+	K int `xml:"k local, omitempty"` // ERROR "suspicious space in struct tag value"
+	L int `xml:" l local,omitempty"` // ERROR "suspicious space in struct tag value"
+	M int `xml:"m  local,omitempty"` // ERROR "suspicious space in struct tag value"
+	N int `xml:" "`                  // ERROR "suspicious space in struct tag value"
 	O int `xml:""`
 	P int `xml:","`
 	Q int `foo:" doesn't care "`