Tested x86_64-pc-linux-gnu, OK for trunk?

-- 8< --

I needed to add module context to dg-prune for libstdc++, and figured it
made sense to sync it with the GCC version rather than maintain slightly
different approaches to stripping the same messages.

libstdc++-v3/ChangeLog:

        * testsuite/lib/prune.exp: Sync with gcc prune.exp.
---
 libstdc++-v3/testsuite/lib/prune.exp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/libstdc++-v3/testsuite/lib/prune.exp 
b/libstdc++-v3/testsuite/lib/prune.exp
index a9a29937e43..93d3d526019 100644
--- a/libstdc++-v3/testsuite/lib/prune.exp
+++ b/libstdc++-v3/testsuite/lib/prune.exp
@@ -53,12 +53,13 @@ proc libstdc++-dg-prune { system 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 requirements  .with\[^\n\]*" $text "" 
text
-    regsub -all "(^|\n)\[^\n\]*:   in requirements with\[^\n\]*" $text "" text
+    regsub -all "(^|\n)\[^\n\]*:   in requirements \[^\n\]*" $text "" text
     regsub -all "(^|\n)    inlined from \[^\n\]*" $text "" text
-    # Why doesn't GCC need these to strip header context?
-    regsub -all "(^|\n)In file included from \[^\n\]*" $text "" text
-    regsub -all "(^|\n)\[ \t\]*from \[^\n\]*" $text "" text
+
+    # Diagnostic inclusion stack
+    regsub -all "(^|\n)(In file)?\[ \]+included from \[^\n\]*" $text "" text
+    regsub -all "(^|\n)\[ \]+from \[^\n\]*" $text "" text
+    regsub -all "(^|\n)(In|of) module( \[^\n \]*,)? imported at \[^\n\]*" 
$text "" text
 
     # Ignore informational notes.
     #TODO As this isn't even using 'gcc-dg.exp', cannot consider its

base-commit: 52a24bcecd388ab6e7d4e6500809fc761f6e7ca5
-- 
2.51.0

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