[gcc/devel/c++-coroutines] Fix dejagnu pruning of constexpr context messages.

[Iain D Sandoe]

https://gcc.gnu.org/g:336da03cc3a1795942938c6187277b666ce9b86c

commit 336da03cc3a1795942938c6187277b666ce9b86c
Author: Jason Merrill <jason@redhat.com>
Date:   Tue Jan 14 00:22:56 2020 -0500

    Fix dejagnu pruning of constexpr context messages.
    
    I wonder why nobody fixed this until now; it's been two years since the
    diagnostic context output was changed.
    
    	* lib/prune.exp (prune_gcc_output): Adjust constexpr pattern.

Diff:
---
 gcc/testsuite/ChangeLog     | 4 ++++
 gcc/testsuite/lib/prune.exp | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 86e954f..72cdbe7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2020-01-14  Jason Merrill  <jason@redhat.com>
+
+	* lib/prune.exp (prune_gcc_output): Adjust constexpr pattern.
+
 2020-01-14  Xiong Hu Luo  <luoxhu@linux.ibm.com>
 
 	PR ipa/69678
diff --git a/gcc/testsuite/lib/prune.exp b/gcc/testsuite/lib/prune.exp
index 6040220..eea4bf3 100644
--- a/gcc/testsuite/lib/prune.exp
+++ b/gcc/testsuite/lib/prune.exp
@@ -35,7 +35,7 @@ proc prune_gcc_output { text } {
     regsub -all "(^|\n)\[^\n\]*(: )?At (top level|global scope):\[^\n\]*" $text "" text
     regsub -all "(^|\n)\[^\n\]*:   (recursively )?required \[^\n\]*" $text "" text
     regsub -all "(^|\n)\[^\n\]*:   . skipping \[0-9\]* instantiation contexts \[^\n\]*" $text "" text
-    regsub -all "(^|\n)\[^\n\]*:   in constexpr expansion \[^\n\]*" $text "" text
+    regsub -all "(^|\n)\[^\n\]*:   in .constexpr. expansion \[^\n\]*" $text "" text
     regsub -all "(^|\n)\[^\n\]*:   in requirements \[^\n\]*" $text "" text
     regsub -all "(^|\n)    inlined from \[^\n\]*" $text "" text
     regsub -all "(^|\n)collect2: error: ld returned \[^\n\]*" $text "" text