[libc++] Remove excess whitespace in synopsis comment. NFCI.

GitOrigin-RevId: d4840175c95f6edcba21baae411589468d5bc68f
diff --git a/include/compare b/include/compare
index 158e67a..4683078 100644
--- a/include/compare
+++ b/include/compare
@@ -20,8 +20,8 @@
   class strong_ordering;
 
   // named comparison functions
-  constexpr bool is_eq  (partial_ordering cmp) noexcept    { return cmp == 0; }
-  constexpr bool is_neq (partial_ordering cmp) noexcept    { return cmp != 0; }
+  constexpr bool is_eq  (partial_ordering cmp) noexcept { return cmp == 0; }
+  constexpr bool is_neq (partial_ordering cmp) noexcept { return cmp != 0; }
   constexpr bool is_lt  (partial_ordering cmp) noexcept { return cmp < 0; }
   constexpr bool is_lteq(partial_ordering cmp) noexcept { return cmp <= 0; }
   constexpr bool is_gt  (partial_ordering cmp) noexcept { return cmp > 0; }