Following clue-stick applied by schwarze@, back out const-ness of regset

passed in to libmdoc and libman.

Fix mdoc.3 and man.3 EXAMPLE sections to include regset.

Add MDOC_SYNPRETTY flag cueing front-end to nicely format certain values
as if SEC_SYNOPSIS were the current section.

1 files changed, 4 insertions, 2 deletions

diff --git a/man.3 b/man.3
index b1551914..d607a7d2 100644
--- a/man.3
+++ b/man.3
@@ -34,7 +34,7 @@
 .Vt extern const char * const * man_macronames;
 .Ft "struct man *"
 .Fo man_alloc
-.Fa "const struct regset *regs"
+.Fa "struct regset *regs"
 .Fa "void *data"
 .Fa "int pflags"
 .Fa "mandocmsg msgs"
@@ -291,14 +291,16 @@ on the finished parse tree with
 .Fn parsed .
 This example does not error-check nor free memory upon failure.
 .Bd -literal -offset indent
+struct regset regs;
 struct man *man;
 struct man_node *node;
 char *buf;
 size_t len;
 int line;
 
+bzero(&regs, sizeof(struct regset));
 line = 1;
-man = man_alloc(NULL, 0, NULL);
+man = man_alloc(&regs, NULL, 0, NULL);
 buf = NULL;
 alloc_len = 0;