Augment the macro-stats test.

With a long macro name that could fit on one line, but currently isn't
formatted that way, because the name would overlap with the maximum
width of the "Uses" column. (The next commit will fix this.)

Author: nnethercote

tests/ui/stats/macro-stats.rs

@@ -49,12 +49,17 @@ fn opt(x: Option<u32>) {
     }
 }
 
-macro_rules! this_is_a_really_really_long_macro_name {
+macro_rules! long_name_that_fits_on_a_single_line {
+    () => {}
+}
+long_name_that_fits_on_a_single_line!();
+
+macro_rules! long_name_that_doesnt_fit_on_one_line {
     ($t:ty) => {
         fn f(_: $t) {}
     }
 }
-this_is_a_really_really_long_macro_name!(u32!()); // AstFragmentKind::{Items,Ty}
+long_name_that_doesnt_fit_on_one_line!(u32!()); // AstFragmentKind::{Items,Ty}
 
 macro_rules! trait_tys {
     () => {

tests/ui/stats/macro-stats.stderr

@@ -15,12 +15,14 @@ macro-stats #[derive(Copy)]                       1          2        2.0
 macro-stats p!                                    1          3        3.0         32       32.0
 macro-stats trait_impl_tys!                       1          2        2.0         28       28.0
 macro-stats foreign_item!                         1          1        1.0         21       21.0
-macro-stats this_is_a_really_really_long_macro_name!
+macro-stats long_name_that_doesnt_fit_on_one_line!
 macro-stats                                       1          1        1.0         18       18.0
 macro-stats impl_const!                           1          1        1.0         17       17.0
 macro-stats trait_tys!                            1          2        2.0         15       15.0
 macro-stats n99!                                  2          2        1.0          4        2.0
 macro-stats none!                                 1          1        1.0          4        4.0
 macro-stats u32!                                  1          1        1.0          3        3.0
+macro-stats long_name_that_fits_on_a_single_line!
+macro-stats                                       1          1        1.0          0        0.0
 macro-stats #[test]                               1          1        1.0          0        0.0
 macro-stats ===================================================================================