[PATCH][committed] aarch64: Fix whitespace in aarch64-ldp-fusion.cc:alias_walker

[Alex Coplan]

I spotted this whitespace error during the review of
https://gcc.gnu.org/pipermail/gcc-patches/2024-April/648846.html.

Pushing as obvious after testing on aarch64-linux-gnu.

Thanks,
Alex

gcc/ChangeLog:

        * config/aarch64/aarch64-ldp-fusion.cc (struct alias_walker):
        Fix double space after const qualifier on valid ().

diff --git a/gcc/config/aarch64/aarch64-ldp-fusion.cc 
b/gcc/config/aarch64/aarch64-ldp-fusion.cc
index 22ed95eb743..365dcf48b22 100644
--- a/gcc/config/aarch64/aarch64-ldp-fusion.cc
+++ b/gcc/config/aarch64/aarch64-ldp-fusion.cc
@@ -2138,7 +2138,7 @@ struct alias_walker
 {
   virtual bool conflict_p (int &budget) const = 0;
   virtual insn_info *insn () const = 0;
-  virtual bool valid () const  = 0;
+  virtual bool valid () const = 0;
   virtual void advance () = 0;
 };