Rust: Add test for character literals.

tests/ctags/test_input.rs

@@ -6,6 +6,15 @@ use std::io::stdio::println;
 use test_input2::*;
 mod test_input2;
 
+fn lifetime_and_char<'lifetime>(_: &'lifetime int)
+{
+	let s = '"';
+	let s = '}';
+	let s = '\'';
+	let s = '\uffff';
+	fn not_hidden_by_char() {}
+}
+
 fn preserve_string_delims(_bar: extern r#"C"# fn()) {}
 
 pub struct A

tests/ctags/test_input.rs.tags

@@ -27,9 +27,11 @@ foo
 foo_field_18Foo0
 gfunc16<X:Testable+DoZ>(x:&X)0
 ignore655360
+lifetime_and_char16<'lifetime>(_: &'lifetime int)0
 main16()0
 my_method128(&self,_:int)Foo0
 nested16()main0
+not_hidden_by_char16()lifetime_and_char0
 only_field8S10
 preserve_string_delims16(_bar: extern r#"C"# fn())0
 size163840