Avoid artifacts in the most common case of closing conditional blocks

when no arguments follow the closing brace, \}.
For example, the line "'br\}" contained in the pod2man(1) preamble
would throw a bogus "escaped character not allowed in a name" error.
This issue was originally reported by Chris Bennett on ports@,
and afresh1@ noticed it came from the pod2man(1) preamble.

1 files changed, 3 insertions, 1 deletions

diff --git a/roff.c b/roff.c
index aabad625..3d0ff481 100644
--- a/roff.c
+++ b/roff.c
@@ -2362,7 +2362,9 @@ roff_cond_checkend(ROFF_ARGS)
 	while ((ep = strchr(ep, '\\')) != NULL) {
 		switch (ep[1]) {
 		case '}':
-			if (rr)
+			if (ep[2] == '\0')
+				ep[0] = '\0';
+			else if (rr)
 				ep[1] = '&';
 			else
 				memmove(ep, ep + 2, strlen(ep + 2) + 1);