maint: make spacing around "=" consistent, even in IF_LINT

E.g.,
  -  size_t desired_width IF_LINT (= 0);
  +  size_t desired_width IF_LINT ( = 0);
Use this command:
  g grep -l IF_LINT | grep '\.[ch]$' \
    | xargs perl -pi -e 's/(IF_LINT \()= /$1 = /'

1 files changed, 1 insertions, 1 deletions

diff --git a/src/copy.c b/src/copy.c
index 78c97ccb0..171499c47 100644
--- a/src/copy.c
+++ b/src/copy.c
@@ -1242,7 +1242,7 @@ copy_internal (char const *src_name, char const *dst_name,
   struct stat src_sb;
   struct stat dst_sb;
   mode_t src_mode;
-  mode_t dst_mode IF_LINT (= 0);
+  mode_t dst_mode IF_LINT ( = 0);
   mode_t dst_mode_bits;
   mode_t omitted_permissions;
   bool restore_dst_mode = false;