From 460a3b20aac43cf4a1deaee566125d60e250496d Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Fri, 27 Jan 2017 16:59:35 +0100
Subject: [PATCH] Don't generate doc if doc comments only filled with 'white'
 characters

---
 src/librustdoc/html/markdown.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index f2427008a7d..8cc3b60a184 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -237,8 +237,9 @@ pub fn render(w: &mut fmt::Formatter,
             let my_opaque: &MyOpaque = &*((*opaque).opaque as *const MyOpaque);
             let text = (*orig_text).as_bytes();
             let origtext = str::from_utf8(text).unwrap();
+            let origtext = origtext.trim_left();
             debug!("docblock: ==============\n{:?}\n=======", text);
-            let rendered = if lang.is_null() {
+            let rendered = if lang.is_null() || origtext.is_empty() {
                 false
             } else {
                 let rlang = (*lang).as_bytes();