runtime(doc): Fix typos in several documents (#13420)

* Fix typos in several documents
* Update runtime/doc/terminal.txt

Co-authored-by: K.Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index cdb4992..a08285e 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -71,7 +71,7 @@
 			  'ttytype'
 			Warning: This may have a lot of side effects.
 
-						*:set-args* *:set=* *E487* *E521*
+					    *:set-args* *:set=* *E487* *E521*
 :se[t] {option}={value}		or
 :se[t] {option}:{value}
 			Set string or number option to {value}.
@@ -4321,8 +4321,8 @@
 	|hl-PmenuSel|	 =  popup menu selected line
 	|hl-PmenuKind|	 [  popup menu "kind" normal line
 	|hl-PmenuKindSel|  ]  popup menu "kind" selected line
-	|hl-PmenuExtra|	 {  popup menu "kind" normal line
-	|hl-PmenuExtraSel| }  popup menu "kind" selected line
+	|hl-PmenuExtra|	 {  popup menu "extra" normal line
+	|hl-PmenuExtraSel| }  popup menu "extra" selected line
 	|hl-PmenuSbar|	 x  popup menu scrollbar
 	|hl-PmenuThumb|	 X  popup menu scrollbar thumb
 
@@ -5747,7 +5747,7 @@
 
 	The 'mousemodel' option is set by the |:behave| command.
 
-	      *'mousemoveevent'* *'mousemev'* *'nomousemoveevent'* *'nomousemev'*
+	    *'mousemoveevent'* *'mousemev'* *'nomousemoveevent'* *'nomousemev'*
 'mousemoveevent' 'mousemev'  boolean	(default off)
 			global
 			{only works in the GUI}
@@ -7996,7 +7996,7 @@
 	This option controls the behavior when switching between buffers.
 	This option is checked, when
 	- jumping to errors with the |quickfix| commands (|:cc|, |:cn|, |:cp|,
-	  etc.)
+	  etc.).
 	- jumping to a tag using the |:stag| command.
 	- opening a file using the |CTRL-W_f| or |CTRL-W_F| command.
 	- jumping to a buffer using a buffer split command (e.g.  |:sbuffer|,
@@ -8973,10 +8973,10 @@
 	displayed when 'verbosefile' is set.
 
 						*'viewdir'* *'vdir'*
-'viewdir' 'vdir'	string	(default for Amiga "home:vimfiles/view",
+'viewdir' 'vdir'	string	(default for Amiga: "home:vimfiles/view",
 					 for Win32: "$HOME/vimfiles/view",
 					 for Unix: "$HOME/.vim/view",
-					 for macOS: "$VIM/vimfiles/view"
+					 for macOS: "$VIM/vimfiles/view",
 					 for VMS: "sys$login:vimfiles/view")
 			global
 			{not available when compiled without the |+mksession|