Remove support for dash at end of name

dev/lib/factory-name.js

@@ -27,7 +27,8 @@ export function factoryName(effects, ok, nok, nameType) {
     }
 
     effects.exit(nameType)
-    // To do next major: disallow `-` at end of name too, for consistency.
-    return self.previous === codes.underscore ? nok(code) : ok(code)
+    return self.previous === codes.dash || self.previous === codes.underscore
+      ? nok(code)
+      : ok(code)
   }
 }

readme.md

@@ -150,7 +150,7 @@ He dies.
 
 The `name` part is required.  The first character must be a letter, other
 characters can be alphanumerical, `-`, and `_`.
-`_` cannot end a name.
+`-` or `_` cannot end a name.
 
 The `[label]` part is optional (`:x` and `:x[]` are equivalent)†.
 When used, it can include text constructs such as emphasis and so on: `x[a *b*

test/index.js

@@ -62,11 +62,17 @@ test('micromark-extension-directive (syntax)', (t) => {
     )
 
     t.equal(
-      micromark(':a-', options()),
+      micromark(':a-b', options()),
       '<p></p>',
       'should support a dash in a name'
     )
 
+    t.equal(
+      micromark(':a-', options()),
+      '<p>:a-</p>',
+      'should *not* support a dash at the end of a name'
+    )
+
     t.equal(
       micromark(':a_b', options()),
       '<p></p>',
@@ -403,7 +409,11 @@ test('micromark-extension-directive (syntax)', (t) => {
       'should support a digit in a name'
     )
 
-    t.equal(micromark('::a-', options()), '', 'should support a dash in a name')
+    t.equal(
+      micromark('::a-b', options()),
+      '',
+      'should support a dash in a name'
+    )
 
     t.equal(
       micromark('::a[', options()),
@@ -744,7 +754,7 @@ test('micromark-extension-directive (syntax)', (t) => {
     )
 
     t.equal(
-      micromark(':::a-', options()),
+      micromark(':::a-b', options()),
       '',
       'should support a dash in a name'
     )