Remove some false positive issues

src/bootstrap/bin/sccache-plus-cl.rs

@@ -18,7 +18,7 @@ fn main() {
     // Locate the actual compiler that we're invoking
     env::remove_var("CC");
     env::remove_var("CXX");
-    let mut cfg = gcc::Build::new();
+    let mut cfg = gcc::Config::new();
     cfg.cargo_metadata(false)
        .out_dir("/")
        .target(&target)

src/libprofiler_builtins/build.rs

@@ -19,7 +19,7 @@ use std::path::Path;
 
 fn main() {
     let target = env::var("TARGET").expect("TARGET was not set");
-    let cfg = &mut gcc::Build::new();
+    let cfg = &mut gcc::Config::new();
 
     let mut profile_sources = vec!["GCDAProfiling.c",
                                    "InstrProfiling.c",

src/librustdoc/build.rs

@@ -14,7 +14,7 @@ extern crate gcc;
 fn main() {
     let src_dir = std::path::Path::new("../rt/hoedown/src");
     build_helper::rerun_if_changed_anything_in_dir(src_dir);
-    let mut cfg = gcc::Build::new();
+    let mut cfg = gcc::Config::new();
     cfg.file("../rt/hoedown/src/autolink.c")
        .file("../rt/hoedown/src/buffer.c")
        .file("../rt/hoedown/src/document.c")

src/librustdoc/html/render.rs

@@ -1659,7 +1659,15 @@ fn get_html_diff(w: &mut fmt::Formatter, md_text: &str, render_type: RenderType,
         println!("Differences spotted in {:?}:\n{}",
                  md_text,
                  differences.iter()
-                            .map(|s| format!("=> {}", s.to_string()))
+                            .filter_map(|s| {
+                                match *s {
+                                    html_diff::Difference::NodeText { ref elem_text,
+                                                                      ref opposite_elem_text,
+                                                                      .. }
+                                        if elem_text.trim() == opposite_elem_text.trim() => None,
+                                    _ => Some(format!("=> {}", s.to_string())),
+                                }
+                            })
                             .collect::<Vec<String>>()
                             .join("\n"));
     }