doc: Turn off special features for rustdoc tests

These were only used for the markdown tests, and there's no reason they should
be distinct from the other tests.

src/librustdoc/test.rs

@@ -91,7 +91,6 @@ pub fn run(input: &str,
 
     let mut collector = Collector::new(krate.name.to_string(),
                                        libs,
-                                       false,
                                        false);
     collector.fold_crate(krate);
 
@@ -103,8 +102,8 @@ pub fn run(input: &str,
 }
 
 fn runtest(test: &str, cratename: &str, libs: HashSet<Path>, should_fail: bool,
-           no_run: bool, loose_feature_gating: bool) {
-    let test = maketest(test, cratename, loose_feature_gating);
+           no_run: bool) {
+    let test = maketest(test, cratename);
     let input = driver::StrInput(test.to_string());
 
     let sessopts = config::Options {
@@ -201,18 +200,12 @@ fn runtest(test: &str, cratename: &str, libs: HashSet<Path>, should_fail: bool,
     }
 }
 
-fn maketest(s: &str, cratename: &str, loose_feature_gating: bool) -> String {
+pub fn maketest(s: &str, cratename: &str) -> String {
     let mut prog = String::from_str(r"
 #![deny(warnings)]
 #![allow(unused_variable, dead_assignment, unused_mut, attribute_usage, dead_code)]
 ");
 
-    if loose_feature_gating {
-        // FIXME #12773: avoid inserting these when the tutorial & manual
-        // etc. have been updated to not use them so prolifically.
-        prog.push_str("#![feature(macro_rules, globs, struct_variant, managed_boxes) ]\n");
-    }
-
     if !s.contains("extern crate") {
         if s.contains(cratename) {
             prog.push_str(format!("extern crate {};\n",
@@ -238,13 +231,11 @@ pub struct Collector {
     use_headers: bool,
     current_header: Option<String>,
     cratename: String,
-
-    loose_feature_gating: bool
 }
 
 impl Collector {
     pub fn new(cratename: String, libs: HashSet<Path>,
-               use_headers: bool, loose_feature_gating: bool) -> Collector {
+               use_headers: bool) -> Collector {
         Collector {
             tests: Vec::new(),
             names: Vec::new(),
@@ -253,8 +244,6 @@ impl Collector {
             use_headers: use_headers,
             current_header: None,
             cratename: cratename,
-
-            loose_feature_gating: loose_feature_gating
         }
     }
 
@@ -268,7 +257,6 @@ impl Collector {
         self.cnt += 1;
         let libs = self.libs.clone();
         let cratename = self.cratename.to_string();
-        let loose_feature_gating = self.loose_feature_gating;
         debug!("Creating test {}: {}", name, test);
         self.tests.push(testing::TestDescAndFn {
             desc: testing::TestDesc {
@@ -281,8 +269,7 @@ impl Collector {
                         cratename.as_slice(),
                         libs,
                         should_fail,
-                        no_run,
-                        loose_feature_gating);
+                        no_run);
             }),
         });
     }