[fstream.general] Insert space around | for consistency (#7534)

Author: Andreas-Krug

source/iostreams.tex

@@ -12305,7 +12305,7 @@
       ios_base::openmode mode = ios_base::in | ios_base::out);
     explicit basic_fstream(
       const filesystem::path::value_type* s,
-      ios_base::openmode mode = ios_base::in|ios_base::out);    // wide systems only; see \ref{fstream.syn}
+      ios_base::openmode mode = ios_base::in | ios_base::out);  // wide systems only; see \ref{fstream.syn}
     explicit basic_fstream(
       const string& s,
       ios_base::openmode mode = ios_base::in | ios_base::out);
@@ -12330,7 +12330,7 @@
       ios_base::openmode mode = ios_base::in | ios_base::out);
     void open(
       const filesystem::path::value_type* s,
-      ios_base::openmode mode = ios_base::in|ios_base::out);    // wide systems only; see \ref{fstream.syn}
+      ios_base::openmode mode = ios_base::in | ios_base::out);  // wide systems only; see \ref{fstream.syn}
     void open(
       const string& s,
       ios_base::openmode mode = ios_base::in | ios_base::out);