Review comments (to squash)

Changes

@@ -20,7 +20,7 @@ Working version
   (David Allsopp, review by ???)
 
 - #10101: Add -help/--help option to ocamlrun.
-  (David Allsopp, review by ???)
+  (David Allsopp, review by Xavier Leroy)
 
 ### Code generation and optimizations:
 

runtime/startup_byt.c

@@ -275,19 +275,21 @@ static char_os * read_section_to_os(int fd, struct exec_trailer *trail,
 
 static void do_print_help(void)
 {
-  puts("Usage: ocamlrun [<options>] [--] <executable> [<command-line>]\n"
-       "Options are:\n"
-       "  -b  Set runtime parameter b (detailed exception backtraces)\n"
-       "  -I <dir>  Add <dir> to the list of DLL search directories\n"
-       "  -m  Print the magic number of <executable> and exit\n"
-       "  -M  Print the magic number expected by this runtime and exit\n"
-       "  -p  Print the names of the primitives known to this runtime\n"
-       "  -t  Increments the trace level in debug mode by 1\n"
-       "  -v  Set runtime parameter v=61 (GC event information)\n"
-       "  -version  Print version string and exit\n"
-       "  -vnum  Print short version number and exit\n"
-       "  -help  Display this list of options\n"
-       "  --help  Display this list of options");
+  printf("%s\n",
+    "Usage: ocamlrun [<options>] [--] <executable> [<command-line>]\n"
+    "Options are:\n"
+    "  -b  Set runtime parameter b (detailed exception backtraces)\n"
+    "  -I <dir>  Add <dir> to the list of DLL search directories\n"
+    "  -m  Print the magic number of <executable> and exit\n"
+    "  -M  Print the magic number expected by this runtime and exit\n"
+    "  -p  Print the names of the primitives known to this runtime\n"
+    "  -t  Trace the execution of the bytecode interpreter (specify multiple\n"
+    "      times to increase verbosity)\n"
+    "  -v  Set runtime parameter v=61 (GC event information)\n"
+    "  -version  Print version string and exit\n"
+    "  -vnum  Print short version number and exit\n"
+    "  -help  Display this list of options\n"
+    "  --help  Display this list of options\n");
 }
 
 /* Parse options on the command line */