gcc-changelog: check git commit email address

contrib/ChangeLog:

	* gcc-changelog/git_commit.py: Check commit email.
	* gcc-changelog/test_email.py: Add new test.
	* gcc-changelog/test_patches.txt: Likewise.

contrib/gcc-changelog/git_commit.py

@@ -326,6 +326,8 @@ class GitCommit:
         if not self.info:
             return
 
+        self.check_commit_email()
+
         # Extract PR numbers form the subject line
         # Match either [PRnnnn] / (PRnnnn) or PR component/nnnn
         if self.info.lines and not self.revert_commit:
@@ -803,3 +805,11 @@ class GitCommit:
         print('Errors:')
         for error in self.errors:
             print(error)
+
+    def check_commit_email(self):
+        # Parse 'Martin Liska  <mliska@suse.cz>'
+        email = self.info.author.split(' ')[-1].strip('<>')
+
+        # Verify that all characters are ASCII
+        if len(email) != len(email.encode()):
+            self.errors.append(Error(f'non-ASCII characters in git commit email address ({email})'))

contrib/gcc-changelog/test_email.py

@@ -440,3 +440,8 @@ class TestGccChangelog(unittest.TestCase):
     def test_copyright_years(self):
         email = self.from_patch_glob('copyright-years.patch')
         assert not email.errors
+
+    def test_non_ascii_email(self):
+        email = self.from_patch_glob('non-ascii-email.patch')
+        assert (email.errors[0].message ==
+                'non-ASCII characters in git commit email address (jbglaw@ług-owl.de)')

contrib/gcc-changelog/test_patches.txt

@@ -3464,3 +3464,28 @@ index 6f67552d075..32478f070e8 100644
 +
 -- 
 2.25.1
+
+=== non-ascii-email.patch ===
+From f42e95a830ab48e59389065ce79a013a519646f1 Mon Sep 17 00:00:00 2001
+From: Jan-Benedict Glaw <jbglaw@ług-owl.de>
+Date: Mon, 13 Sep 2021 12:08:25 +0200
+Subject: [PATCH] Fix multi-statment macro
+
+INIT_CUMULATIVE_ARGS() expands to multiple statements, which will break right
+after an `if` statement. Wrap it into a block.
+
+gcc/ChangeLog:
+
+	* config/alpha/vms.h (INIT_CUMULATIVE_ARGS): Wrap multi-statment
+	define into a block.
+---
+ gcc/config/alpha/vms.h | 10 +++++++---
+ 1 file changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/gcc/config/alpha/vms.h b/gcc/config/alpha/vms.h
+index 2a9917cde62..0033b0004b3 100644
+--- a/gcc/config/alpha/vms.h
++++ b/gcc/config/alpha/vms.h
+@@ -0,0 +1,1 @@
++
+--