minirst: correctly format sections containing inline markup

Before, a section like

  ``foo``
  -------

would be formatted as

  "foo"
  -------

We now recompute the length of the underline when formatting the
section.

mercurial/minirst.py

@@ -241,13 +241,15 b' def findsections(blocks):'
         if (block['type'] == 'paragraph' and
             len(block['lines']) == 2 and
             block['lines'][1] == '-' * len(block['lines'][0])):
+            block['underline'] = block['lines'][1][0]
             block['type'] = 'section'
+            del block['lines'][1]
     return blocks
 
 
 def inlineliterals(blocks):
     for b in blocks:
-        if b['type'] == 'paragraph':
+        if b['type'] in ('paragraph', 'section'):
             b['lines'] = [l.replace('``', '"') for l in b['lines']]
     return blocks
 
@@ -256,7 +258,7 b' def inlineliterals(blocks):'
 
 def hgrole(blocks):
     for b in blocks:
-        if b['type'] == 'paragraph':
+        if b['type'] in ('paragraph', 'section'):
             b['lines'] = [_hgrolere.sub(r'"hg \1"', l) for l in b['lines']]
     return blocks
 
@@ -289,7 +291,8 b' def formatblock(block, width):'
         indent += '  '
         return indent + ('\n' + indent).join(block['lines'])
     if block['type'] == 'section':
-        return indent + ('\n' + indent).join(block['lines'])
+        underline = len(block['lines'][0]) * block['underline']
+        return "%s%s\n%s%s" % (indent, block['lines'][0],indent, underline)
     if block['type'] == 'definition':
         term = indent + block['lines'][0]
         hang = len(block['lines'][-1]) - len(block['lines'][-1].lstrip())
@@ -341,11 +344,11 b' def format(text, width, indent=0, keep=N'
         b['indent'] += indent
     blocks = findliteralblocks(blocks)
     blocks, pruned = prunecontainers(blocks, keep or [])
+    blocks = findsections(blocks)
     blocks = inlineliterals(blocks)
     blocks = hgrole(blocks)
     blocks = splitparagraphs(blocks)
     blocks = updatefieldlists(blocks)
-    blocks = findsections(blocks)
     blocks = addmargins(blocks)
     text = '\n'.join(formatblock(b, width) for b in blocks)
     if keep is None:

tests/test-minirst.py

@@ -186,5 +186,8 b" debugformat('roles', roles, 60)"
 sections = """
 A Somewhat Wide Section Header
 ------------------------------
+
+Markup: ``foo`` and :hg:`help`
+------------------------------
 """
 debugformat('sections', sections, 20)

tests/test-minirst.py.out

@@ -307,5 +307,8 b' sections formatted to fit within 20 char'
 ----------------------------------------------------------------------
 A Somewhat Wide Section Header
 ------------------------------
+
+Markup: "foo" and "hg help"
+---------------------------
 ----------------------------------------------------------------------