runtime(doc): Fix small style issues

closes: #14942

Signed-off-by: h-east <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/usr_52.txt b/runtime/doc/usr_52.txt
index 553ed88..d5062e2 100644
--- a/runtime/doc/usr_52.txt
+++ b/runtime/doc/usr_52.txt
@@ -1,4 +1,4 @@
-*usr_52.txt*	For Vim version 9.1.  Last change: 2024 May 31
+*usr_52.txt*	For Vim version 9.1.  Last change: 2024 Jun 09
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -341,7 +341,7 @@
 
 COMMENT PACKAGE
 
-Vim comes with a comment plugin, written in Vim9 script |comment-install|.
+Vim comes with a comment plugin, written in Vim9 script.  |comment-install|
 Have a look at the package located at $VIMRUNTIME/pack/dist/opt/comment/
 
 HIGHLIGHT YANK PLUGIN
@@ -350,27 +350,27 @@
 |getregionpos()| function, available since Vim 9.1.0446.
 
 Copy the following example into a new file and place it into your plugin directory
-and it will be active next time you start Vim |add-plugin|: >
+and it will be active next time you start Vim.  |add-plugin|: >
 
 	vim9script
 
 	def HighlightedYank(hlgroup = 'IncSearch', duration = 300, in_visual = true)
 	  if v:event.operator ==? 'y'
-		  if !in_visual && visualmode() != null_string
-			visualmode(1)
-			return
-		  endif
-		  var [beg, end] = [getpos("'["), getpos("']")]
-		  var type = v:event.regtype ?? 'v'
-		  var pos = getregionpos(beg, end, {type: type})
-		  var end_offset = (type == 'V' || v:event.inclusive) ? 1 : 0
-		  var m = matchaddpos(hlgroup, pos->mapnew((_, v) => {
-			var col_beg = v[0][2] + v[0][3]
-			var col_end = v[1][2] + v[1][3] + end_offset
-			return [v[0][1], col_beg, col_end - col_beg]
-		  }))
-		  var winid = win_getid()
-		  timer_start(duration, (_) => m->matchdelete(winid))
+	    if !in_visual && visualmode() != null_string
+	      visualmode(1)
+	      return
+	    endif
+	    var [beg, end] = [getpos("'["), getpos("']")]
+	    var type = v:event.regtype ?? 'v'
+	    var pos = getregionpos(beg, end, {type: type})
+	    var end_offset = (type == 'V' || v:event.inclusive) ? 1 : 0
+	    var m = matchaddpos(hlgroup, pos->mapnew((_, v) => {
+	      var col_beg = v[0][2] + v[0][3]
+	      var col_end = v[1][2] + v[1][3] + end_offset
+	      return [v[0][1], col_beg, col_end - col_beg]
+	    }))
+	    var winid = win_getid()
+	    timer_start(duration, (_) => m->matchdelete(winid))
 	  endif
 	enddef