emacs-27 c37de84: Fix typos and markup in fill column indicator docs

[Basil L. Contovounesios]

branch: emacs-27
commit c37de84845a4e666cadd209470b81c8abaa2fd77
Author: Basil L. Contovounesios <contovob@tcd.ie>
Commit: Basil L. Contovounesios <contovob@tcd.ie>

    Fix typos and markup in fill column indicator docs
    
    * doc/emacs/display.texi (Displaying Boundaries): Fix typos and
    Texinfo markup.
---
 doc/emacs/display.texi | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi
index d98441b..849679e 100644
--- a/doc/emacs/display.texi
+++ b/doc/emacs/display.texi
@@ -1174,19 +1174,20 @@ right-to-left paragraphs.
 @findex display-fill-column-indicator-mode
 @findex global-display-fill-column-indicator-mode
   Emacs can add an indicator to display a fill column position.  The
-fill column indicator is a useful functionality specially in
-prog-mode to indicate the position of an specific column.
+fill column indicator is a useful functionality especially in
+@code{prog-mode} to indicate the position of a specific column.
 
-  You can set the buffer-local variables @code{display-fill-column-indicator}
-and @code{display-fill-column-indicator-character} to activate the
-indicator and controls how the indicator looks.
+  You can set the buffer-local variables
+@code{display-fill-column-indicator} and
+@code{display-fill-column-indicator-character} to activate the
+indicator and control how it looks, respectively.
 
 Alternatively you can type @w{@kbd{M-x display-fill-column-indicator-mode}}
-or @w{@kbd{M-x global-display-fill-column-indicator-mode}} which enables the
-indicator locally and globally respectively and also chooses the
-character to use if none is set already.  It is possible to use the
-first one to activate the indicator in a hook or the second one to
-enable it globally.
+or @w{@kbd{M-x global-display-fill-column-indicator-mode}} which
+enables the indicator locally or globally, respectively, and also
+chooses the character to use if none is already set.  It is possible
+to use the first one to activate the indicator in a hook and the
+second one to enable it globally.
 
 There are 2 buffer local variables and 1 face to customize this mode:
 
@@ -1203,20 +1204,20 @@ Any other value disables the indicator.  The default 
value is @code{t}.
 @item display-fill-column-indicator-character
 @vindex display-fill-column-indicator-character
 Specifies the character used for the indicator.  This character can be
-any valid char including unicode ones if the actual font supports
-them.
+any valid character including Unicode ones if the font supports them.
 
 When the mode is enabled through the functions
 @code{display-fill-column-indicator-mode} or
 @code{global-display-fill-column-indicator-mode}, the initialization
-functions check if this variable is @code{non-nil}, otherwise the
-initialization tries to set it to U+2502 or @samp{|}.
+functions check if this variable is non-@code{nil}, otherwise the
+initialization tries to set it to @code{U+2502} or @samp{|}.
 
 @item fill-column-indicator
 @vindex fill-column-indicator
 Specifies the face used to display the indicator.  It inherits its
-default values from shadow but without background color.  To change
-the indicator color you need to set only the foreground color of this face.
+default values from the face @code{shadow} but without background
+color.  To change the indicator color you need only set the foreground
+color of this face.
 @end table
 
 @vindex indicate-buffer-boundaries