Add Goldmark as the new default markdown handler

This commit adds the fast and CommonMark compliant Goldmark as the new default markdown handler in Hugo.

If you want to continue using BlackFriday as the default for md/markdown extensions, you can use this configuration:

```toml
[markup]
defaultMarkdownHandler="blackfriday"
```

Fixes #5963
Fixes #1778
Fixes #6355

docs/content/en/getting-started/configuration-markup.md

@@ -0,0 +1,73 @@
+---
+title: Configure Markup
+description: How to handle Markdown and other markup related configuration.
+date: 2019-11-15
+categories: [getting started,fundamentals]
+keywords: [configuration,highlighting]
+weight: 65
+sections_weight: 65
+slug: configuration-markup
+toc: true
+---
+
+## Configure Markup
+
+{{< new-in "0.60.0" >}}
+
+See [Goldmark](#goldmark) for settings related to the default Markdown handler in Hugo.
+
+Below are all markup related configuration in Hugo with their default settings:
+
+{{< code-toggle config="markup" />}}
+
+**See each section below for details.**
+
+### Goldmark
+
+[Goldmark](https://github.com/yuin/goldmark/) is from Hugo 0.60 the default library used for Markdown. It's fast, it's [CommonMark](https://spec.commonmark.org/0.29/) compliant and it's very flexible. Note that the feature set of Goldmark vs Blackfriday isn't the same; you gain a lot but also lose some, but we will work to bridge any gap in the upcoming Hugo versions.
+
+This is the default configuration:
+
+{{< code-toggle config="markup.goldmark" />}}
+
+Some settings explained:
+
+unsafe
+: By default, Goldmark does not render raw HTMLs and potentially dangerous links. If you have lots of inline HTML and/or JavaScript, you may need to turn this on.
+
+typographer
+: This extension substitutes punctuations with typographic entities like [smartypants](https://daringfireball.net/projects/smartypants/).
+
+### Blackfriday
+
+
+[Blackfriday](https://github.com/russross/blackfriday) was Hugo's default Markdown rendering engine, now replaced with Goldmark. But you can still use it: Just set `defaultMarkdownHandler` to `blackfriday` in your top level `markup` config.
+
+This is the default config:
+
+{{< code-toggle config="markup.blackFriday" />}}
+
+### Highlight
+
+This is the default `highlight` configuration. Note that some of these settings can be set per code block, see [Syntax Highlighting](/content-management/syntax-highlighting/).
+
+{{< code-toggle config="markup.highlight" />}}
+
+For `style`, see these galleries:
+
+* [Short snippets](https://xyproto.github.io/splash/docs/all.html)
+* [Long snippets](https://xyproto.github.io/splash/docs/longer/all.html)
+
+For CSS, see [Generate Syntax Highlighter CSS](/content-management/syntax-highlighting/#generate-syntax-highlighter-css).
+
+### Table Of Contents
+
+{{< code-toggle config="markup.tableOfContents" />}}
+
+These settings only works for the Goldmark renderer:
+
+startLevel
+: The heading level, values starting at 1 (`h1`), to start render the table of contents.
+
+endLevel
+: The heading level, inclusive, to stop render the table of contents.

docs/content/en/getting-started/configuration.md

@@ -184,11 +184,14 @@ log (false)
 logFile ("")
 : Log File path (if set, logging enabled automatically).
 
+markup
+: See [Configure Markup](/getting-started/configuration-markup).{{< new-in "0.60.0" >}}
+
 menu
 : See [Add Non-content Entries to a Menu](/content-management/menus/#add-non-content-entries-to-a-menu).
 
 module
-: Module config see [Module Config](/hugo-modules/configuration/).
+: Module config see [Module Config](/hugo-modules/configuration/).{{< new-in "0.56.0" >}}
 
 newContentEditor ("")
 : The editor to use when creating new content.
@@ -214,26 +217,8 @@ pluralizeListTitles (true)
 publishDir ("public")
 : The directory to where Hugo will write the final static site (the HTML files etc.).
 
-pygmentsOptions ("")
-:  A comma separated list of options for syntax highlighting. See the [Syntax Highlighting Options](/content-management/syntax-highlighting/#options) for the full list of available options.
-
-pygmentsCodeFences (false)
-: Enables syntax highlighting in [code fences with a language tag](/content-management/syntax-highlighting/#highlight-in-code-fences) in markdown.
-
-pygmentsCodeFencesGuessSyntax (false)
-: Enable syntax guessing for code fences without specified language.
-
-pygmentsStyle ("monokai")
-: Color-theme or style for syntax highlighting. See [Pygments Color Themes](https://help.farbox.com/pygments.html).
-
-pygmentsUseClasses (false)
-: Enable using external CSS for syntax highlighting.
-
-pygmentsUseClassic (false)
-: Enable using Pygments instead of the much faster Chroma for syntax highlighting.
-
 related
-: See [Related Content](/content-management/related/#configure-related-content).
+: See [Related Content](/content-management/related/#configure-related-content).{{< new-in "0.27" >}}
 
 relativeURLs (false)
 : Enable this to make all relative URLs relative to content root. Note that this does not affect absolute URLs.
@@ -436,29 +421,6 @@ The above will try first to extract the value for `.Date` from the filename, the
 `:git`
 : This is the Git author date for the last revision of this content file. This will only be set if `--enableGitInfo` is set or `enableGitInfo = true` is set in site config.
 
-## Configure Blackfriday
-
-[Blackfriday](https://github.com/russross/blackfriday) is Hugo's built-in Markdown rendering engine.
-
-Hugo typically configures Blackfriday with sane default values that should fit most use cases reasonably well.
-
-However, if you have specific needs with respect to Markdown, Hugo exposes some of its Blackfriday behavior options for you to alter. The following table lists these Hugo options, paired with the corresponding flags from Blackfriday's source code ( [html.go](https://github.com/russross/blackfriday/blob/master/html.go) and [markdown.go](https://github.com/russross/blackfriday/blob/master/markdown.go)).
-
-{{< readfile file="/content/en/readfiles/bfconfig.md" markdown="true" >}}
-
-{{% note %}}
-1. Blackfriday flags are *case sensitive* as of Hugo v0.15.
-2. Blackfriday flags must be grouped under the `blackfriday` key and can be set on both the site level *and* the page level. Any setting on a page will override its respective site setting.
-{{% /note %}}
-
-{{< code-toggle file="config" >}}
-[blackfriday]
-  angledQuotes = true
-  fractions = false
-  plainIDAnchors = true
-  extensions = ["hardLineBreak"]
-{{< /code-toggle >}}
-
 ## Configure Additional Output Formats
 
 Hugo v0.20 introduced the ability to render your content to multiple output formats (e.g., to JSON, AMP html, or CSV). See [Output Formats][] for information on how to add these values to your Hugo project's configuration file.

docs/content/en/getting-started/installing.md

@@ -502,12 +502,6 @@ OpenBSD provides a package for Hugo via `pkg_add`:
 
 Upgrading Hugo is as easy as downloading and replacing the executable you’ve placed in your `PATH` or run `brew upgrade hugo` if using Homebrew.
 
-## Install Pygments (Optional)
-
-The Hugo executable has one *optional* external dependency for source code highlighting ([Pygments][pygments]).
-
-If you want to have source code highlighting using the [highlight shortcode][], you need to install the Python-based Pygments program. The procedure is outlined on the [Pygments homepage][pygments].
-
 ## Next Steps
 
 Now that you've installed Hugo, read the [Quick Start guide][quickstart] and explore the rest of the documentation. If you have questions, ask the Hugo community directly by visiting the [Hugo Discussion Forum][forum].