Rollup merge of #51227 - uuttff8:master, r=dtolnay

mod.rs isn't beautiful

I hate this spaces.

Author: GuillaumeGomez

src/libcore/char/mod.rs

@@ -60,10 +60,10 @@ use fmt::{self, Write};
 use iter::FusedIterator;
 
 // UTF-8 ranges and tags for encoding characters
-const TAG_CONT: u8    = 0b1000_0000;
-const TAG_TWO_B: u8   = 0b1100_0000;
-const TAG_THREE_B: u8 = 0b1110_0000;
-const TAG_FOUR_B: u8  = 0b1111_0000;
+const TAG_CONT: u8     = 0b1000_0000;
+const TAG_TWO_B: u8    = 0b1100_0000;
+const TAG_THREE_B: u8  = 0b1110_0000;
+const TAG_FOUR_B: u8   = 0b1111_0000;
 const MAX_ONE_B: u32   =     0x80;
 const MAX_TWO_B: u32   =    0x800;
 const MAX_THREE_B: u32 =  0x10000;