Update docs

README.md

@@ -187,8 +187,9 @@ void some_func() {
 Since in C and C++, blocks are delimited using braces (`{` & `}`),
 match-up will recognize `{` as the open word and `}` as the close word.
 It will ignore the `if` and `else if` because they are not defined in
-vim's C file type plugin.
-With [Tree-sitter](#tree-sitter-integration)
+vim's default C file type plugin.
+(Note: In neovim, this is optionally supported via
+[Tree-sitter](#tree-sitter-integration))
 
 On the other hand, match-up will recognize the `#if`, `#else`, `#endif`
 preprocessor directives.
@@ -562,8 +563,9 @@ following optional keys:
   `'popup'`: Show off-screen matches in a popup (vim) or
   floating (neovim) window.
 
-  `'status_manual'`: Compute the status-line but do not display it (future
-  extension).
+  `'status_manual'`: Compute the string which would be displayed in the
+  status-line or popup, but do not display it.  The function
+  `MatchupStatusOffscreen()` can be used to get the text.
 
 - `scrolloff`:
   When enabled, off-screen matches will not be shown in the statusline while
@@ -780,7 +782,8 @@ have customized vimtex's delimiters.
 ### Surroundings
 
 match-up provides built-in support for [vim-surround]-style `ds%` and
-`cs%` operations.  If vim-surround is installed, you can use vim-surround
+`cs%` operations (`let g:matchup_surround_enabled = 1`).
+If vim-surround is installed, you can use vim-surround
 replacements such as `cs%)`.  `%` cannot be used as a replacement.
 An alternative plugin is [vim-sandwich], which allows more complex
 surround replacement rules but is not currently supported.

doc/matchup.txt

@@ -629,8 +629,9 @@ Module matchparen~
     an additional Δ symbol will be shown to indicate that the matching line is
     really above the cursor line.
 
-    `'status_manual'`: Compute the status-line but do not display it (future
-    extension).
+    `'status_manual'`: Compute the string which would be displayed in the
+    status-line or popup, but do not display it.  The function
+    `MatchupStatusOffscreen()` can be used to get the text.
 
     `'popup'`: Use a popup window (requires at least vim 8.1.1406) or
     a floating window (in neovim) to show the off-screen match.
@@ -650,6 +651,19 @@ Module matchparen~
       let g:matchup_matchparen_offscreen
           \ = {'method': 'popup', 'highlight': 'OffscreenPopup'}
 <
+  syntax_hl~
+    For popup method on vim only: syntax highlight the code in the popup.
+    May have performance implications.
+
+    Default: 0
+
+  border~
+    For floating window on neovim only: set to add a border.  If the value
+    is the integer 1, default borders are enabled.  A list or string can
+    be specified as described in |nvim_open_win()|.
+
+    Default: 0
+
   Default: `{'method': 'status'}`
 
 *g:matchup_matchparen_stopline*