[PATCH] Fix testsuire error message

https://gcc.gnu.org/ml/gcc-patches/2017-11/msg00196.html
	* lib/scanlang.exp: Fix error message to refer to scan-lang-dump.

From-SVN: r254375

gcc/testsuite/ChangeLog

 2017-11-03  Nathan Sidwell  <nathan@acm.org>
 
+	* lib/scanlang.exp: Fix error message to refer to scan-lang-dump.
+
 	PR c++/82710
 	* g++.dg/warn/pr82710.C: More cases.
 

gcc/testsuite/lib/scanlang.exp

@@ -28,11 +28,11 @@ load_lib scandump.exp
 proc scan-lang-dump { args } {
 
     if { [llength $args] < 2 } {
-	error "scan-tree-dump: too few arguments"
+	error "scan-lang-dump: too few arguments"
 	return
     }
     if { [llength $args] > 3 } {
-	error "scan-tree-dump: too many arguments"
+	error "scan-lang-dump: too many arguments"
 	return
     }
     if { [llength $args] >= 3 } {