auto merge of #12055 : dguenther/rust/tidy_test, r=alexcrichton

This PR extends the tidy formatting check to rust files in the test folder. To facilitate this, a few flags were added to tidy:

* `xfail-tidy-cr` - Disables the check for CR characters for all following lines in the file
* `xfail-tidy-tab` - Disables the check for tab characters for all following lines in the file
* `xfail-tidy-linelength` - Disables the line length check for all following lines in the file

Checks should not have to be disabled often. I disabled line length checks in `debug-info` tests that use `debugger:` checks, but aside from that, there were relatively few exclusions. Running tidy on all the tests does slow down the formatting check, so it may be worth investigating further optimization.

cc #4534

1 files changed, 6 insertions, 3 deletions

diff --git a/src/test/compile-fail/resolve-inconsistent-binding-mode.rs b/src/test/compile-fail/resolve-inconsistent-binding-mode.rs
index 351daf461d2..a230e813a48 100644
--- a/src/test/compile-fail/resolve-inconsistent-binding-mode.rs
+++ b/src/test/compile-fail/resolve-inconsistent-binding-mode.rs
@@ -14,21 +14,24 @@ enum opts {
 
 fn matcher1(x: opts) {
     match x {
-      a(ref i) | b(i) => {} //~ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
+      a(ref i) | b(i) => {}
+      //~^ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
       c(_) => {}
     }
 }
 
 fn matcher2(x: opts) {
     match x {
-      a(ref i) | b(i) => {} //~ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
+      a(ref i) | b(i) => {}
+      //~^ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
       c(_) => {}
     }
 }
 
 fn matcher4(x: opts) {
     match x {
-      a(ref mut i) | b(ref i) => {} //~ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
+      a(ref mut i) | b(ref i) => {}
+      //~^ ERROR variable `i` is bound with different mode in pattern #2 than in pattern #1
       c(_) => {}
     }
 }