fix: correct missing ones

Author: vwkd

css-backgrounds-3/Overview.bs

@@ -1498,10 +1498,21 @@ they apply to the top, right, bottom, and left, respectively.
   and if it does what style it's drawn in
   (if it is not overridden by a <a href="#border-images">border image</a>).
 
-<p>'Border-style' is a shorthand for the
-other four. Its four values set the top, right, bottom and left border
-respectively. A missing left is the same as right, a missing bottom is
-the same as top, and a missing right is also the same as top.
+<p>The 'border-style' property is a shorthand property for setting
+'border-top-style', 'border-right-style', 'border-bottom-style', and 'border-left-style'
+in a single declaration.
+
+<p>If there is only one component value,
+it applies to all sides.
+If there are two values,
+the top and bottom are set to the first value
+and the right and left are set to the second.
+If there are three values,
+the top is set to the first value,
+the left and right are set to the second,
+and the bottom is set to the third.
+If there are four values
+they apply to the top, right, bottom, and left, respectively.
 
 <p>Where
 <pre class=prod><dfn><<line-style>></dfn> = none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset</pre>
@@ -1656,11 +1667,21 @@ e.g., make the thickness depend on the ''medium'' font size: one
 choice might be 1, 3 &amp; 5px when the ''medium'' font size is 17px or
 less. Negative values are not allowed.
 
-<p>'Border-width' is a shorthand that sets the
-four 'border-*-width' properties. If it has four values, they set top, right,
-bottom and left in that order. If left is missing, it is the same as right;
-if bottom is missing, it is the same as top; if right is missing, it is the
-same as top.
+<p>The 'border-width' property is a shorthand property for setting
+'border-top-width', 'border-right-width', 'border-bottom-width', and 'border-left-width'
+in a single declaration.
+
+<p>If there is only one component value,
+it applies to all sides.
+If there are two values,
+the top and bottom are set to the first value
+and the right and left are set to the second.
+If there are three values,
+the top is set to the first value,
+the left and right are set to the second,
+and the bottom is set to the third.
+If there are four values
+they apply to the top, right, bottom, and left, respectively.
 
 <p class="note">Note that the initial width is ''medium'', but the initial
 style is ''border-style/none'' and therefore the used width is 0.
@@ -2278,10 +2299,17 @@ The middle image part is discarded (treated as fully transparent)
 unless the ''fill'' keyword is present. (It is drawn over the background;
 see <a href="#border-image-process">Drawing the Border Image</a>.)
 
-<p>When four values are specified, they set the offsets on the top,
-right, bottom and left sides in that order. If the left is missing, it is
-the same as the right; if the bottom is missing, it is the same as the top;
-if the right is missing, it is the same as the top.
+<p>If there is only one component value,
+it applies to all sides.
+If there are two values,
+the top and bottom are set to the first value
+and the right and left are set to the second.
+If there are three values,
+the top is set to the first value,
+the left and right are set to the second,
+and the bottom is set to the third.
+If there are four values
+they apply to the top, right, bottom, and left, respectively.
 
 <dl dfn-for=border-image-slice dfn-type=value>
   <dt><dfn><<percentage [0,&infin;]>></dfn>
@@ -2359,9 +2387,21 @@ by default correspond to the border box, see 'border-image-outset'.
 <p>The four values of 'border-image-width' specify offsets that are used
 to divide the border image area into nine parts. They represent inward
 distances from the the top, right, bottom, and left sides of the
-area, respectively. If the left width is missing, it is the same as the right;
-if the bottom is missing, it is the same as the top; if the right is missing,
-it is the same as the top. Values have the following meanings:</p>
+area, respectively.
+
+<p>If there is only one component value,
+it applies to all sides.
+If there are two values,
+the top and bottom are set to the first value
+and the right and left are set to the second.
+If there are three values,
+the top is set to the first value,
+the left and right are set to the second,
+and the bottom is set to the third.
+If there are four values
+they apply to the top, right, bottom, and left, respectively.
+
+Values have the following meanings:</p>
 
 <dl dfn-for=border-image-width dfn-type=value>
   <dt><dfn><<length-percentage [0,&infin;]>></dfn>
@@ -2427,10 +2467,18 @@ them by <var>f</var>.
 
 
 <p>The values specify the amount by which the <a>border image area</a> extends beyond the border box.
-If it has four values, they set the outsets on the top, right, bottom and
-left sides in that order. If the left is missing, it is the same as the right;
-if the bottom is missing, it is the same as the top; if the right is missing,
-it is the same as the top.
+
+If there is only one component value,
+it applies to all sides.
+If there are two values,
+the top and bottom are set to the first value
+and the right and left are set to the second.
+If there are three values,
+the top is set to the first value,
+the left and right are set to the second,
+and the bottom is set to the third.
+If there are four values
+they apply to the top, right, bottom, and left, respectively.
 
 <dl dfn-for=border-image-outset dfn-type=value>
   <dt><<length [0,&infin;]>>