[pushed] Fix double space expected in cp_test_ptype_class

[Simon Marchi <simon.marchi@polymtl.ca>]

I noticed some failures of some buildbot slaves, e.g.:

FAIL: gdb.cp/nested-types.exp: ptype S10 (limit = 1) // wrong nested type enum definition: enum S10::E10 {S10::A10, S10::B10, S10::C10};

The issue is that they have an older gcc (not c++11 by default?) that
doesn't emit the enum underlying type information.  When the
enum type is printed by ptype, it looks like this:

  enum S10::E10 {S10::A10, S10::B10, S10::C10};

instead of this on older gccs:

  enum S10::E10 : unsigned int {S10::A10, S10::B10, S10::C10};

The regex that matches this is in cp_test_ptype_class, and is

  enum $nested_name (: (unsigned )?int)? \{

If the "unsigned int" portion is not present, then it requires the
string to have two spaces between the enum name and opening bracket.
The fix is simply to move the trailing space inside the ? group.

gdb/testsuite/ChangeLog:

	* lib/cp-support.exp (cp_test_ptype_class): Move space inside
	parentheses.
---
 gdb/testsuite/ChangeLog          | 5 +++++
 gdb/testsuite/lib/cp-support.exp | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index e1bd8df424..9659e37f0c 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-25  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* lib/cp-support.exp (cp_test_ptype_class): Move space inside
+	parentheses.
+
 2018-02-23  Maciej W. Rozycki  <macro@mips.com>
 
 	* lib/cp-support.exp (cp_test_ptype_class): Fix a typo in the
diff --git a/gdb/testsuite/lib/cp-support.exp b/gdb/testsuite/lib/cp-support.exp
index 66b58d5f60..58c21a9161 100644
--- a/gdb/testsuite/lib/cp-support.exp
+++ b/gdb/testsuite/lib/cp-support.exp
@@ -564,7 +564,7 @@ proc cp_test_ptype_class { in_exp in_testname in_key in_tag in_class_table
 	    switch $nested_key {
 		enum {
 		    set expected_result \
-			"enum $nested_name (: (unsigned )?int)? \{"
+			"enum $nested_name (: (unsigned )?int )?\{"
 		    foreach c $nested_children {
 			append expected_result "$c, "
 		    }
-- 
2.16.1