Fix typos in documentation

CHANGELOG

@@ -775,7 +775,7 @@ Also contains various documentation updates and code clean-ups.
   248862c5
 
 - Added support for disabling and dimming suffix commands that are
-  currently not suitable, instead of completely hidding them.  #80
+  currently not suitable, instead of completely hiding them.  #80
 
 - Autoload functions that serve a purpose similar to that of
   ~define-key~. #85

docs/transient.org

@@ -650,7 +650,7 @@ Also see [[* Common Suffix Commands]].
 
   If the value is ~fixed~ and the menu window uses the full height of its
   frame, then the former is ignored and resizing is allowed anyway.  This
-  is necessary because individual menus may use unusal display actions
+  is necessary because individual menus may use unusual display actions
   different from what ~transient-display-buffer-action~ specifies (likely
   to display that menu in a side-window).
 

docs/transient.texi

@@ -808,7 +808,7 @@ below.
 
 If the value is @code{fixed} and the menu window uses the full height of its
 frame, then the former is ignored and resizing is allowed anyway.  This
-is necessary because individual menus may use unusal display actions
+is necessary because individual menus may use unusual display actions
 different from what @code{transient-display-buffer-action} specifies (likely
 to display that menu in a side-window).
 

lisp/transient.el

@@ -215,7 +215,7 @@ buffer became the current buffer, then that would change what is
 at point.  To that effect `inhibit-same-window' ensures that the
 selected window is not used to show the transient buffer.
 
-The use of a horizonal split to display the menu window can lead
+The use of a horizontal split to display the menu window can lead
 to incompatibilities and is thus discouraged.  Transient tries to
 mitigate such issue but cannot proactively deal with all possible
 configurations and combinations of third-party packages.
@@ -292,7 +292,7 @@ below.
 
 If the value is `fixed' and the menu window uses the full height of its
 frame, then the former is ignored and resizing is allowed anyway.  This
-is necessary because individual menus may use unusal display actions
+is necessary because individual menus may use unusual display actions
 different from what `transient-display-buffer-action' specifies (likely
 to display that menu in a side-window).