[css-syntax] Fix <an+b> grammar for cases that contain "n- "

Author: SimonSapin

css-syntax/Overview.html

@@ -2503,17 +2503,19 @@ <h3 data-level=6.2 id=the-anb-type><span class=secno>6.2 </span><span class=cont
     '+'?<sup><a href=#anb-plus>†</a></sup> n <var>&lt;signed-integer&gt;</var> |
     -n <var>&lt;signed-integer&gt;</var> |
 
+    <var>&lt;ndash-dimension&gt;</var> <var>&lt;signless-integer&gt;</var> |
+    '+'?<sup><a href=#anb-plus>†</a></sup> n- <var>&lt;signless-integer&gt;</var> |
+    -n- <var>&lt;signless-integer&gt;</var> |
+
     <var>&lt;n-dimension&gt;</var> ['+' | '-'] <var>&lt;signless-integer&gt;</var>
     '+'?<sup><a href=#anb-plus>†</a></sup> n ['+' | '-'] <var>&lt;signless-integer&gt;</var> |
     -n ['+' | '-'] <var>&lt;signless-integer&gt;</var>
 </pre>
-	<p class=issue>
-		Ugh, I'm missing cases like "n- 5".
-
 <p>	where:
 
 <p>	<ul>
 		<li><dfn data-dfn-type=type id=typedef-n-dimension><code>&lt;n-dimension&gt;</code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for "n"
+		<li><dfn data-dfn-type=type id=typedef-ndash-dimension><code>&lt;ndash-dimension&gt;</code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for "n-"
 		<li><dfn data-dfn-type=type id=typedef-ndashdigit-dimension><code>&lt;ndashdigit-dimension&gt;</code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for "n-*", where "*" is a series of one or more <a href=#digit>digits</a>
 		<li><dfn data-dfn-type=type id=typedef-ndashdigit-ident><code>&lt;ndashdigit-ident&gt;</code></dfn> is an 〈ident〉 whose value is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for "n-*", where "*" is a series of one or more <a href=#digit>digits</a>
 		<li><dfn data-dfn-type=type id=typedef-dashndashdigit-ident><code>&lt;dashndashdigit-ident&gt;</code></dfn> is an 〈ident〉 whose value is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for "-n-*", where "*" is a series of one or more <a href=#digit>digits</a>
@@ -2570,6 +2572,13 @@ <h3 data-level=6.2 id=the-anb-type><span class=secno>6.2 </span><span class=cont
 			<var>A</var> is the dimension's value, 1, or -1, respectively.
 			<var>B</var> is the integer’s value.
 
+		<dt><code><var>&lt;ndash-dimension&gt;</var> <var>&lt;signless-integer&gt;</var></code>
+		<dt><code>'+'? n- <var>&lt;signless-integer&gt;</var></code>
+		<dt><code>-n- <var>&lt;signless-integer&gt;</var></code>
+		<dd>
+			<var>A</var> is the dimension's value, 1, or -1, respectively.
+			<var>B</var> is the negation of the integer’s value.
+
 		<dt><code><var>&lt;n-dimension&gt;</var> ['+' | '-'] <var>&lt;signless-integer&gt;</var></code>
 		<dt><code>'+'? n ['+' | '-'] <var>&lt;signless-integer&gt;</var></code>
 		<dt><code>-n ['+' | '-'] <var>&lt;signless-integer&gt;</var></code>
@@ -3235,6 +3244,7 @@ <h2 class="no-num no-ref" id=index><span class=content>
 <li>name-start character, <a href=#name-start-character title="section 4.2">4.2</a>
 <li>&lt;ndashdigit-dimension&gt;, <a href=#typedef-ndashdigit-dimension title="section 6.2">6.2</a>
 <li>&lt;ndashdigit-ident&gt;, <a href=#typedef-ndashdigit-ident title="section 6.2">6.2</a>
+<li>&lt;ndash-dimension&gt;, <a href=#typedef-ndash-dimension title="section 6.2">6.2</a>
 <li>&lt;n-dimension&gt;, <a href=#typedef-n-dimension title="section 6.2">6.2</a>
 <li>newline, <a href=#newline title="section 4.2">4.2</a>
 <li>next input character, <a href=#next-input-character title="section 4.2">4.2</a>

css-syntax/Overview.src.html

@@ -2383,18 +2383,20 @@ <h3 id="the-anb-type">
 		  '+'?<sup><a href="#anb-plus">†</a></sup> n <var>&lt;signed-integer></var> |
 		  -n <var>&lt;signed-integer></var> |
 
+		  <var>&lt;ndash-dimension></var> <var>&lt;signless-integer></var> |
+		  '+'?<sup><a href="#anb-plus">†</a></sup> n- <var>&lt;signless-integer></var> |
+		  -n- <var>&lt;signless-integer></var> |
+
 		  <var>&lt;n-dimension></var> ['+' | '-'] <var>&lt;signless-integer></var>
 		  '+'?<sup><a href="#anb-plus">†</a></sup> n ['+' | '-'] <var>&lt;signless-integer></var> |
 		  -n ['+' | '-'] <var>&lt;signless-integer></var>
 	</pre>
 
-	<p class='issue'>
-		Ugh, I'm missing cases like "n- 5".
-
 	where:
 
 	<ul>
 		<li><dfn><code>&lt;n-dimension></code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a>ASCII case-insensitive</a> match for "n"
+		<li><dfn><code>&lt;ndash-dimension></code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a>ASCII case-insensitive</a> match for "n-"
 		<li><dfn><code>&lt;ndashdigit-dimension></code></dfn> is a 〈dimension〉 with its type flag set to "integer", and a unit that is an <a>ASCII case-insensitive</a> match for "n-*", where "*" is a series of one or more <a>digits</a>
 		<li><dfn><code>&lt;ndashdigit-ident></code></dfn> is an 〈ident〉 whose value is an <a>ASCII case-insensitive</a> match for "n-*", where "*" is a series of one or more <a>digits</a>
 		<li><dfn><code>&lt;dashndashdigit-ident></code></dfn> is an 〈ident〉 whose value is an <a>ASCII case-insensitive</a> match for "-n-*", where "*" is a series of one or more <a>digits</a>
@@ -2451,6 +2453,13 @@ <h3 id="the-anb-type">
 			<var>A</var> is the dimension's value, 1, or -1, respectively.
 			<var>B</var> is the integer’s value.
 
+		<dt><code><var>&lt;ndash-dimension></var> <var>&lt;signless-integer></var></code>
+		<dt><code>'+'? n- <var>&lt;signless-integer></var></code>
+		<dt><code>-n- <var>&lt;signless-integer></var></code>
+		<dd>
+			<var>A</var> is the dimension's value, 1, or -1, respectively.
+			<var>B</var> is the negation of the integer’s value.
+
 		<dt><code><var>&lt;n-dimension></var> ['+' | '-'] <var>&lt;signless-integer></var></code>
 		<dt><code>'+'? n ['+' | '-'] <var>&lt;signless-integer></var></code>
 		<dt><code>-n ['+' | '-'] <var>&lt;signless-integer></var></code>