Revert "enable ENABLE_HARD_LINE_BREAK by default (go-gitea#11162)"

This reverts commit 7e20f1c.

This commit causes Gitea to diverge from Github not move towards it
and should be reverted

Author: zeripath

custom/conf/app.ini.sample

@@ -213,10 +213,8 @@ TIMEOUT_STEP = 10s
 EVENT_SOURCE_UPDATE_TIME = 10s
 
 [markdown]
-; Render soft line breaks as hard line breaks, which means a single newline character between
-; paragraphs will cause a line break and adding trailing whitespace to paragraphs is not
-; necessary to force a line break.
-ENABLE_HARD_LINE_BREAK = true
+; Enable hard line break extension
+ENABLE_HARD_LINE_BREAK = false
 ; Comma separated list of custom URL-Schemes that are allowed as links when rendering Markdown
 ; for example git,magnet,ftp (more at https://en.wikipedia.org/wiki/List_of_URI_schemes)
 ; URLs starting with http and https are always displayed, whatever is put in this entry.

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -152,9 +152,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 
 ## Markdown (`markdown`)
 
-- `ENABLE_HARD_LINE_BREAK`: **true**: Render soft line breaks as hard line breaks, which
-  means a single newline character between paragraphs will cause a line break and adding
-  trailing whitespace to paragraphs is not necessary to force a line break.
+- `ENABLE_HARD_LINE_BREAK`: **false**: Enable Markdown's hard line break extension.
 - `CUSTOM_URL_SCHEMES`: Use a comma separated list (ftp,git,svn) to indicate additional
   URL hyperlinks to be rendered in Markdown. URLs beginning in http and https are
   always displayed

modules/markup/markdown/markdown_test.go

@@ -133,9 +133,9 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
 `,
 		`<p><a href="http://www.excelsiorjet.com/" rel="nofollow">Excelsior JET</a> allows you to create native executables for Windows, Linux and Mac OS X.</p>
 <ol>
-<li><a href="https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop" rel="nofollow">Package your libGDX application</a><br/>
+<li><a href="https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop" rel="nofollow">Package your libGDX application</a>
 <a href="` + baseURLImages + `/images/1.png" rel="nofollow"><img src="` + baseURLImages + `/images/1.png" title="1.png" alt="images/1.png"/></a></li>
-<li>Perform a test run by hitting the Run! button.<br/>
+<li>Perform a test run by hitting the Run! button.
 <a href="` + baseURLImages + `/images/2.png" rel="nofollow"><img src="` + baseURLImages + `/images/2.png" title="2.png" alt="images/2.png"/></a></li>
 </ol>
 <h2 id="user-content-custom-id">More tests</h2>

modules/setting/setting.go

@@ -260,7 +260,7 @@ var (
 		CustomURLSchemes    []string `ini:"CUSTOM_URL_SCHEMES"`
 		FileExtensions      []string
 	}{
-		EnableHardLineBreak: true,
+		EnableHardLineBreak: false,
 		FileExtensions:      strings.Split(".md,.markdown,.mdown,.mkd", ","),
 	}
 

routers/api/v1/misc/markdown_test.go

@@ -94,7 +94,7 @@ Here are some links to the most important topics. You can find the full list of
 <p><strong>Wine Staging</strong> on website <a href="http://wine-staging.com" rel="nofollow">wine-staging.com</a>.</p>
 <h2 id="user-content-quick-links">Quick Links</h2>
 <p>Here are some links to the most important topics. You can find the full list of pages at the sidebar.</p>
-<p><a href="` + AppSubURL + `wiki/Configuration" rel="nofollow">Configuration</a><br/>
+<p><a href="` + AppSubURL + `wiki/Configuration" rel="nofollow">Configuration</a>
 <a href="` + AppSubURL + `wiki/raw/images/icon-bug.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images/icon-bug.png" title="icon-bug.png" alt="images/icon-bug.png"/></a></p>
 `,
 		// Guard wiki sidebar: special syntax