a string '_blabla_' at the end of line has not been recognized properly

as text to be represented as underline.

- updated tests and HTML references

lib/python/StructuredText/DocumentClass.py

@@ -854,8 +854,7 @@ class DocumentClass:
     
     def doc_underline(self,
                       s,
-                      #expr=re.compile(r"\_([a-zA-Z0-9\s\.,\?]+)\_").search, # old expr, inconsistent punc, failed to cross newlines
-                      expr=re.compile(r'_([%s%s%s\s]+)_[\s%s]' % (letters, digits, under_punc,phrase_delimiters)).search):
+                      expr=re.compile(r'_([%s%s%s\s]+)_([\s%s]|$)' % (letters, digits, under_punc,phrase_delimiters)).search):
 
         result = expr(s)
         if result:
@@ -863,7 +862,7 @@ class DocumentClass:
                return None # no double unders
             start,end = result.span(1)
             st,e = result.span()
-            return (StructuredTextUnderline(s[start:end]),st,e-1)
+            return (StructuredTextUnderline(s[start:end]),st,e-len(result.group(2)))
         else:
             return None
     

lib/python/StructuredText/regressions/examples.ref

@@ -31,11 +31,11 @@
 <p><a name="ref1">[1]</a> (The referring text should be a paragraph, not a header, and
 should contain a reference to this footnote, footnote "<a href="#ref1">[1]</a>".)<p>  Some hrefs, in a definition list:</p>
 <dl>
-<dt>  _Regular_</dt>
+<dt>  <u>Regular</u></dt>
 <dd><a href="http://www.zope.org">http://www.zope.org/</a></dd>
-<dt>  _W/trailing punctuation_</dt>
+<dt>  <u>W/trailing punctuation</u></dt>
 <dd><a href="http://www.zope.org">http://www.zope.org/</a>.</dd>
-<dt>  _W protocol implicit_</dt>
+<dt>  <u>W protocol implicit</u></dt>
 <dd><a href=":locallink">locallink</a></dd>
 <dt>  <u>W protocol implicit</u>, alternate</dt>
 <dd>"locallink", :locallink</dd>
@@ -46,3 +46,4 @@ should contain a reference to this footnote, footnote "<a href="#ref1">[1]</a>".
 </p>
 </body>
 </html>
+

lib/python/StructuredText/tests/testStructuredText.py

@@ -144,6 +144,11 @@ class BasicTests(unittest.TestCase):
         self._test("xx _this is html_ xx",
                    "xx <u>this is html</u> xx")
 
+    def testUnderline1(self):
+        """underline 1"""
+        self._test("xx _this is html_",
+                   "<u>this is html</u>")
+        
     def testEmphasis(self):
         """ emphasis """
         self._test("xx *this is html* xx",