Strip any leading '#' and whitespace from comments

Author: tomasr8

Lib/test/test_tools/i18n_data/comments.pot

@@ -101,3 +101,10 @@ msgstr ""
 msgid "thud"
 msgstr ""
 
+#. i18n: This is a translator comment
+#. i18n: This is another translator comment
+#. i18n: This is yet another translator comment
+#: comments.py:78
+msgid "foos"
+msgstr ""
+

Lib/test/test_tools/i18n_data/comments.py

@@ -70,3 +70,9 @@
 # i18n: This is a translator comment
 _('xyzzy')
 _('thud')
+
+
+## i18n: This is a translator comment
+# # i18n: This is another translator comment
+### ###    i18n: This is yet another translator comment
+_('foos')

Tools/i18n/pygettext.py

@@ -144,6 +144,7 @@
 import importlib.machinery
 import importlib.util
 import os
+import re
 import sys
 import time
 import tokenize
@@ -329,7 +330,9 @@ def get_source_comments(source):
     comments = {}
     for token in tokenize.tokenize(BytesIO(source).readline):
         if token.type == tokenize.COMMENT:
-            comments[token.start[0]] = token.string.removeprefix('#').strip()
+            # Remove any leading combination of '#' and whitespace
+            comment = re.sub(r'^[#\s]+', '', token.string)
+            comments[token.start[0]] = comment
     return comments