[fs.class.path] Fix inline whitespace

Author: JohelEGP

source/iostreams.tex

@@ -11796,7 +11796,7 @@
     friend bool operator==(const path& lhs, const path& rhs) noexcept;
     friend strong_ordering operator<=>(const path& lhs, const path& rhs) noexcept;
 
-    friend path operator/ (const path& lhs, const path& rhs);
+    friend path operator/(const path& lhs, const path& rhs);
 
     // \ref{fs.path.native.obs}, native format observers
     const string_type& native() const noexcept;