Enable descriptive header IDs.

Enable blackfriday.EXTENSION_AUTO_HEADER_IDS to generate the name of the
header ID from the text in the header. Works for prefix and underline
headers.

- TOC extraction had to be modified to look for `<li><a href="#`>
  instead of `#toc_` because of this change.
- Fixed a number of tests that depended on the presence of `toc_` with
  as an `id` or as a `href` value.
- Renames the earlier parameter `footnoteref` to `documentId` as it more
  accurately represents the nature of the parameter. The `documentId` is
  appended to all generated headers through the new HTML renderer
  parameter `HeaderIDSuffix`.

1 files changed, 2 insertions, 2 deletions

diff --git a/hugolib/shortcode_test.go b/hugolib/shortcode_test.go
index 002946bfd..9c5bc1c58 100644
--- a/hugolib/shortcode_test.go
+++ b/hugolib/shortcode_test.go
@@ -74,7 +74,7 @@ func TestInnerSCWithMarkdown(t *testing.T) {
 
 [link](http://spf13.com) and text
 
-{{% /inside %}}`, "<div><h1>More Here</h1>\n\n<p><a href=\"http://spf13.com\">link</a> and text</p>\n</div>", tem)
+{{% /inside %}}`, "<div><h1 id=\"more-here:bec3ed8ba720b9073ab75abcf3ba5d97\">More Here</h1>\n\n<p><a href=\"http://spf13.com\">link</a> and text</p>\n</div>", tem)
 }
 
 func TestInnerSCWithAndWithoutMarkdown(t *testing.T) {
@@ -96,7 +96,7 @@ And then:
 This is **plain** text.
 
 {{< /inside >}}
-`, "<div><h1>More Here</h1>\n\n<p><a href=\"http://spf13.com\">link</a> and text</p>\n</div>\n\nAnd then:\n\n<div>\n# More Here\n\nThis is **plain** text.\n\n</div>\n", tem)
+`, "<div><h1 id=\"more-here:bec3ed8ba720b9073ab75abcf3ba5d97\">More Here</h1>\n\n<p><a href=\"http://spf13.com\">link</a> and text</p>\n</div>\n\nAnd then:\n\n<div>\n# More Here\n\nThis is **plain** text.\n\n</div>\n", tem)
 }
 
 func TestEmbeddedSC(t *testing.T) {