diff -r 6f30c35766d6 -r a1ae0ed78d1a mercurial/minirst.py
--- a/mercurial/minirst.py	Sun Dec 13 22:37:30 2009 +0100
+++ b/mercurial/minirst.py	Sun Dec 13 23:49:53 2009 +0100
@@ -113,7 +113,7 @@
 
 _bulletre = re.compile(r'(-|[0-9A-Za-z]+\.|\(?[0-9A-Za-z]+\)) ')
 _optionre = re.compile(r'^(--[a-z-]+)((?:[ =][a-zA-Z][\w-]*)?  +)(.*)$')
-_fieldre = re.compile(r':(?![: ])([^:]*)(?<! ):( +)(.*)')
+_fieldre = re.compile(r':(?![: ])([^:]*)(?<! ):[ ]+(.*)')
 _definitionre = re.compile(r'[^ ]')
 
 def splitparagraphs(blocks):
@@ -159,6 +159,33 @@
     return blocks
 
 
+_fieldwidth = 12
+
+def updatefieldlists(blocks):
+    """Find key and maximum key width for field lists."""
+    i = 0
+    while i < len(blocks):
+        if blocks[i]['type'] != 'field':
+            i += 1
+            continue
+
+        keywidth = 0
+        j = i
+        while j < len(blocks) and blocks[j]['type'] == 'field':
+            m = _fieldre.match(blocks[j]['lines'][0])
+            key, rest = m.groups()
+            blocks[j]['lines'][0] = rest
+            blocks[j]['key'] = key
+            keywidth = max(keywidth, len(key))
+            j += 1
+
+        for block in blocks[i:j]:
+            block['keywidth'] = keywidth
+        i = j + 1
+
+    return blocks
+
+
 def findsections(blocks):
     """Finds sections.
 
@@ -228,11 +255,21 @@
         m = _bulletre.match(block['lines'][0])
         subindent = indent + m.end() * ' '
     elif block['type'] == 'field':
-        m = _fieldre.match(block['lines'][0])
-        key, spaces, rest = m.groups()
-        # Turn ":foo: bar" into "foo   bar".
-        block['lines'][0] = '%s  %s%s' % (key, spaces, rest)
-        subindent = indent + (2 + len(key) + len(spaces)) * ' '
+        keywidth = block['keywidth']
+        key = block['key']
+
+        subindent = indent + _fieldwidth * ' '
+        if len(key) + 2 > _fieldwidth:
+            # key too large, use full line width
+            key = key.ljust(width)
+        elif keywidth + 2 < _fieldwidth:
+            # all keys are small, add only two spaces
+            key = key.ljust(keywidth + 2)
+            subindent = indent + (keywidth + 2) * ' '
+        else:
+            # mixed sizes, use fieldwidth for this one
+            key = key.ljust(_fieldwidth)
+        block['lines'][0] = key + block['lines'][0]
     elif block['type'] == 'option':
         m = _optionre.match(block['lines'][0])
         option, arg, rest = m.groups()
@@ -252,6 +289,7 @@
     blocks = findliteralblocks(blocks)
     blocks = inlineliterals(blocks)
     blocks = splitparagraphs(blocks)
+    blocks = updatefieldlists(blocks)
     blocks = findsections(blocks)
     blocks = addmargins(blocks)
     return '\n'.join(formatblock(b, width) for b in blocks)
@@ -272,6 +310,7 @@
     blocks = debug(findliteralblocks, blocks)
     blocks = debug(inlineliterals, blocks)
     blocks = debug(splitparagraphs, blocks)
+    blocks = debug(updatefieldlists, blocks)
     blocks = debug(findsections, blocks)
     blocks = debug(addmargins, blocks)
     print '\n'.join(formatblock(b, 30) for b in blocks)