Update cortex-a-rt/src/lib.rs

Co-authored-by: Jonathan Pallant <[email protected]>

Author: robamu

cortex-a-rt/src/lib.rs

@@ -432,7 +432,7 @@ core::arch::global_asm!(
         tst      r4, {t_bit}
         // If not in Thumb mode, branch to not_thumb
         beq     not_thumb
-	      subs	lr, lr, #2
+        subs.   lr, lr, #2
         b       done
 not_thumb:
         // Subtract 4 from LR (ARM mode)