servo: Merge #10751 - Report lines starting with && in tidy (from zwn:tidy-start-operator); r=Wafflespeanut

Partial implementation of the issue #10692 (the easy part).

Source-Repo: https://github.com/servo/servo
Source-Revision: d926b5d3762a101d5280266f806f2b979f73b695

servo/python/tidy/servo_tidy/tidy.py

@@ -378,6 +378,7 @@ def check_rust(file_name, lines):
             (r": &Vec<", "use &[T] instead of &Vec<T>", no_filter),
             # No benefit over using &str
             (r": &String", "use &str instead of &String", no_filter),
+            (r"^&&", "operators should go at the end of the first line", no_filter),
         ]
 
         for pattern, message, filter_func in regex_rules:
@@ -647,6 +648,7 @@ def scan(faster=False, progress=True):
     error = None
     for error in errors:
         print "\r\033[94m{}\033[0m:\033[93m{}\033[0m: \033[91m{}\033[0m".format(*error)
+    print
     if error is None:
-        print "\n\033[92mtidy reported no errors.\033[0m"
+        print "\033[92mtidy reported no errors.\033[0m"
     return int(error is not None)