Markdown writer: omit extra space after bullets.

We used to insert extra spaces to ensure that the content respected
the four-space rule.  That is not really necessary now, since pandoc's
markdown and most markdowns don't follow the four-space rule.

Those who want the old behavior can obtain it by using
`-t markdown+four_space_rule`.

Closes #7172.

15 files changed, 85 insertions, 68 deletions

diff --git a/test/command/10484.md b/test/command/10484.md
index 510446aa4..979517e9c 100644
--- a/test/command/10484.md
+++ b/test/command/10484.md
@@ -13,10 +13,10 @@
 __ https://github.com/joe/project/issues/999
 
 ^D
--   One issue fixed: [issue
-    123](https://github.com/joe/project/issues/123).
--   One change merged: [Big
-    change](https://github.com/joe/project/pull/234).
--   Improved the [home page](https://example.com/homepage).
--   One more [small change](https://github.com/joe/project/issues/999).
+- One issue fixed: [issue
+  123](https://github.com/joe/project/issues/123).
+- One change merged: [Big
+  change](https://github.com/joe/project/pull/234).
+- Improved the [home page](https://example.com/homepage).
+- One more [small change](https://github.com/joe/project/issues/999).
 ```
diff --git a/test/command/3487.md b/test/command/3487.md
index 1d475676f..65d6f22e7 100644
--- a/test/command/3487.md
+++ b/test/command/3487.md
@@ -7,5 +7,5 @@ Some text
 ^D
 Some text
 
--   element
+- element
 ```
diff --git a/test/command/3596.md b/test/command/3596.md
index 01a871e1b..972395ef7 100644
--- a/test/command/3596.md
+++ b/test/command/3596.md
@@ -6,9 +6,9 @@
 <li>baz</li>
 </ul>
 ^D
--   foo
--   bar
--   baz
+- foo
+- bar
+- baz
 ```
 
 ```
@@ -19,10 +19,10 @@
 <li>baz</li>
 </ul>
 ^D
--   foo
--   bar
-    -   subbar
--   baz
+- foo
+- bar
+  - subbar
+- baz
 ```
 
 
@@ -34,9 +34,9 @@
 <li>baz</li>
 </ul>
 ^D
--   foo
--   [bar]{#id}
--   baz
+- foo
+- [bar]{#id}
+- baz
 ```
 
 
@@ -48,12 +48,12 @@
 <li><p>baz</p></li>
 </ul>
 ^D
--   foo
+- foo
 
--   ::: {#id}
-    bar
-    :::
+- ::: {#id}
+  bar
+  :::
 
--   baz
+- baz
 
 ```
diff --git a/test/command/5705.md b/test/command/5705.md
index 589910669..a8923999d 100644
--- a/test/command/5705.md
+++ b/test/command/5705.md
@@ -6,6 +6,6 @@
    [[Plain [Str "Blah"]]]]]]
 ^D
 VIII. Blah
-      -   Blah
+      - Blah
 ```
 
diff --git a/test/command/5857.md b/test/command/5857.md
index 31320cd12..5f15ce3d6 100644
--- a/test/command/5857.md
+++ b/test/command/5857.md
@@ -5,7 +5,7 @@
  ,[]
  ,[Plain [Str "b"]]]]
 ^D
--   a
--   
--   b
+- a
+- 
+- b
 ```
diff --git a/test/command/5967.md b/test/command/5967.md
index 9bb802d40..fb4e63e50 100644
--- a/test/command/5967.md
+++ b/test/command/5967.md
@@ -4,8 +4,8 @@
 ## Two
 #### Four
 ^D
--   One
-    -   Two
+- One
+  - Two
 
 One
 
diff --git a/test/command/6858.md b/test/command/6858.md
index 53cb9bddb..3428157ff 100644
--- a/test/command/6858.md
+++ b/test/command/6858.md
@@ -46,7 +46,7 @@ hi
 
 there
 ^D
--   hi
+- hi
 
--   there
+- there
 ```
diff --git a/test/command/7172.md b/test/command/7172.md
new file mode 100644
index 000000000..a7b5a4c1c
--- /dev/null
+++ b/test/command/7172.md
@@ -0,0 +1,17 @@
+```
+% pandoc -t markdown
+- one
+  - two
+^D
+- one
+  - two
+```
+
+```
+% pandoc -t markdown+four_space_rule
+- one
+  - two
+^D
+-   one
+    -   two
+```
diff --git a/test/command/7329.md b/test/command/7329.md
index 9ed9c52ff..b5f590d7b 100644
--- a/test/command/7329.md
+++ b/test/command/7329.md
@@ -55,13 +55,13 @@ Doe, John. 2005. /First Book/. Cambridge: Cambridge University Press.
 - [cite:@item1; @item2]
 - [cite:see @item1; @item2]
 ^D
--   @item1
--   @item1 [p. 12]
--   @item1 [p.12; see also @item2]
--   [@item1]
--   [-@item1]
--   [see @item1 p. 12]
--   [see @item1 p. 12 and *passim*]
--   [@item1; @item2]
--   [see @item1; @item2]
+- @item1
+- @item1 [p. 12]
+- @item1 [p.12; see also @item2]
+- [@item1]
+- [-@item1]
+- [see @item1 p. 12]
+- [see @item1 p. 12 and *passim*]
+- [@item1; @item2]
+- [see @item1; @item2]
 ```
diff --git a/test/command/8131.md b/test/command/8131.md
index 6820542f6..02f6edc92 100644
--- a/test/command/8131.md
+++ b/test/command/8131.md
@@ -19,7 +19,7 @@ Content
 
 Content
 ^D
--   [Head](#head)
+- [Head](#head)
 
 # Head
 
diff --git a/test/command/8150.md b/test/command/8150.md
index 5034bed1e..36865dbcf 100644
--- a/test/command/8150.md
+++ b/test/command/8150.md
@@ -11,11 +11,11 @@ Nested bullet lists
   <li>L4</li>
 </ul>
 ^D
--   L1
--   L2
-    -   L3.1
-    -   L3.2
--   L4
+- L1
+- L2
+  - L3.1
+  - L3.2
+- L4
 ```
 
 Nested ordered lists
@@ -48,8 +48,8 @@ Ordered list nested below an unordered list
 	</ol>
 </ul>
 ^D
--   L1
--   L2
-    1.  L3.1
-    2.  L3.2
+- L1
+- L2
+  1.  L3.1
+  2.  L3.2
 ```
diff --git a/test/command/8402.md b/test/command/8402.md
index 67536227c..aa5fd880c 100644
--- a/test/command/8402.md
+++ b/test/command/8402.md
@@ -19,14 +19,14 @@ text
 ## inner 3
 text
 ^D
--   [Summary](#summary){#toc-summary}
-    -   [Overview and
-        Explanation](#overview-and-explanation){#toc-overview-and-explanation}
--   [Details](#details){#toc-details}
-    -   [inner 1](#inner-1){#toc-inner-1}
-    -   [inner 2](#inner-2){#toc-inner-2}
-        -   [inner inner 1](#inner-inner-1){#toc-inner-inner-1}
-    -   [inner 3](#inner-3){#toc-inner-3}
+- [Summary](#summary){#toc-summary}
+  - [Overview and
+    Explanation](#overview-and-explanation){#toc-overview-and-explanation}
+- [Details](#details){#toc-details}
+  - [inner 1](#inner-1){#toc-inner-1}
+  - [inner 2](#inner-2){#toc-inner-2}
+    - [inner inner 1](#inner-inner-1){#toc-inner-inner-1}
+  - [inner 3](#inner-3){#toc-inner-3}
 
 ::: {#6u8qXoeFGdqt .cell .markdown}
 # Summary
diff --git a/test/command/9908.md b/test/command/9908.md
index 9954298e0..a4aa2cdd6 100644
--- a/test/command/9908.md
+++ b/test/command/9908.md
@@ -4,7 +4,7 @@
     [ [ BlockQuote [ Para [ Str "a" ] , Para [ Str "b" ] ] ] ]
 ]
 ^D
--   > a
-    >
-    > b
+- > a
+  >
+  > b
 ```
diff --git a/test/command/tasklist.md b/test/command/tasklist.md
index 9aaa0a8aa..177845aac 100644
--- a/test/command/tasklist.md
+++ b/test/command/tasklist.md
@@ -100,6 +100,6 @@ round trip:
 - [ ] foo
 - [x] bar
 ^D
--   [ ] foo
--   [x] bar
+- [ ] foo
+- [x] bar
 ```
\ No newline at end of file
diff --git a/test/command/toc.md b/test/command/toc.md
index 7474955e5..e681e93af 100644
--- a/test/command/toc.md
+++ b/test/command/toc.md
@@ -16,12 +16,12 @@
 ## e
 :::
 ^D
--   [A](#a){#toc-a}
-    -   [b](#b){#toc-b}
--   [B](#b-1){#toc-b-1}
-    -   [b](#b-2){#toc-b-2}
--   [E](#e){#toc-e}
-    -   [e](#e-1){#toc-e-1}
+- [A](#a){#toc-a}
+  - [b](#b){#toc-b}
+- [B](#b-1){#toc-b-1}
+  - [b](#b-2){#toc-b-2}
+- [E](#e){#toc-e}
+  - [e](#e-1){#toc-e-1}
 
 # A