Set the marker back to 'm' rather than 't' if it matches the QUOT_PATTERN. Updated test case.

talon/quotations.py

@@ -509,7 +509,10 @@ def _correct_splitlines_in_headers(markers, lines):
                 if bool(re.search(RE_HEADER, lines[i])):
                     in_header_block = True
             else:
-                m = 't'
+                if QUOT_PATTERN.match(lines[i]):
+                    m = 'm'
+                else:
+                    m = 't'
 
         # If the line is not a header line, set in_header_block false.
         if not bool(re.search(RE_HEADER, lines[i])):

tests/text_quotations_test.py

@@ -730,6 +730,6 @@ Hey!
 > > Subject: Test
 > > Hi
 """
-    expected_markers = "stttttsttttetesttesmtmmmmsmtmm"
+    expected_markers = "stttttsttttetesttesmmmmmmsmmmm"
     markers = quotations.split_emails(msg)
     eq_(markers, expected_markers)