doc/filters: alphabetically sort drawtext option listing

doc/filters.texi

@@ -1262,37 +1262,19 @@ The description of the accepted parameters follows.
 
 @table @option
 
-@item fontfile
-The font file to be used for drawing text. Path must be included.
-This parameter is mandatory.
-
-@item text
-The text string to be drawn. The text must be a sequence of UTF-8
-encoded characters.
-This parameter is mandatory if no file is specified with the parameter
-@var{textfile}.
-
-@item textfile
-A text file containing text to be drawn. The text must be a sequence
-of UTF-8 encoded characters.
-
-This parameter is mandatory if no text string is specified with the
-parameter @var{text}.
-
-If both text and textfile are specified, an error is thrown.
-
-@item x, y
-The expressions which specify the offsets where text will be drawn
-within the video frame. They are relative to the top/left border of the
-output image.
-
-The default value of @var{x} and @var{y} is "0".
+@item box
+Used to draw a box around text using background color.
+Value should be either 1 (enable) or 0 (disable).
+The default value of @var{box} is 0.
 
-See below for the list of accepted constants.
+@item boxcolor
+The color to be used for drawing box around text.
+Either a string (e.g. "yellow") or in 0xRRGGBB[AA] format
+(e.g. "0xff00ff"), possibly followed by an alpha specifier.
+The default value of @var{boxcolor} is "white".
 
-@item fontsize
-The font size to be used for drawing text.
-The default value of @var{fontsize} is 16.
+@item fix_bounds
+If true, check and fix text coords to avoid clipping.
 
 @item fontcolor
 The color to be used for drawing fonts.
@@ -1300,27 +1282,13 @@ Either a string (e.g. "red") or in 0xRRGGBB[AA] format
 (e.g. "0xff000033"), possibly followed by an alpha specifier.
 The default value of @var{fontcolor} is "black".
 
-@item boxcolor
-The color to be used for drawing box around text.
-Either a string (e.g. "yellow") or in 0xRRGGBB[AA] format
-(e.g. "0xff00ff"), possibly followed by an alpha specifier.
-The default value of @var{boxcolor} is "white".
-
-@item box
-Used to draw a box around text using background color.
-Value should be either 1 (enable) or 0 (disable).
-The default value of @var{box} is 0.
-
-@item shadowx, shadowy
-The x and y offsets for the text shadow position with respect to the
-position of the text. They can be either positive or negative
-values. Default value for both is "0".
+@item fontfile
+The font file to be used for drawing text. Path must be included.
+This parameter is mandatory.
 
-@item shadowcolor
-The color to be used for drawing a shadow behind the drawn text.  It
-can be a color name (e.g. "yellow") or a string in the 0xRRGGBB[AA]
-form (e.g. "0xff00ff"), possibly followed by an alpha specifier.
-The default value of @var{shadowcolor} is "black".
+@item fontsize
+The font size to be used for drawing text.
+The default value of @var{fontsize} is 16.
 
 @item ft_load_flags
 Flags to be used for loading the fonts.
@@ -1351,12 +1319,44 @@ Default value is "render".
 For more information consult the documentation for the FT_LOAD_*
 libfreetype flags.
 
+@item shadowcolor
+The color to be used for drawing a shadow behind the drawn text.  It
+can be a color name (e.g. "yellow") or a string in the 0xRRGGBB[AA]
+form (e.g. "0xff00ff"), possibly followed by an alpha specifier.
+The default value of @var{shadowcolor} is "black".
+
+@item shadowx, shadowy
+The x and y offsets for the text shadow position with respect to the
+position of the text. They can be either positive or negative
+values. Default value for both is "0".
+
 @item tabsize
 The size in number of spaces to use for rendering the tab.
 Default value is 4.
 
-@item fix_bounds
-If true, check and fix text coords to avoid clipping.
+@item text
+The text string to be drawn. The text must be a sequence of UTF-8
+encoded characters.
+This parameter is mandatory if no file is specified with the parameter
+@var{textfile}.
+
+@item textfile
+A text file containing text to be drawn. The text must be a sequence
+of UTF-8 encoded characters.
+
+This parameter is mandatory if no text string is specified with the
+parameter @var{text}.
+
+If both text and textfile are specified, an error is thrown.
+
+@item x, y
+The expressions which specify the offsets where text will be drawn
+within the video frame. They are relative to the top/left border of the
+output image.
+
+The default value of @var{x} and @var{y} is "0".
+
+See below for the list of accepted constants.
 @end table
 
 The parameters for @var{x} and @var{y} are expressions containing the