Skipping all escape sequences at the beginning of strings in deroff()

was too aggressive.  There are strings that legitimately begin with
an escape sequence.  Only skip leading escape sequences representing
whitespace.

Bug reported by martijn@.

1 files changed, 4 insertions, 8 deletions

diff --git a/roff.c b/roff.c
index 8a9e49e9..542272ba 100644
--- a/roff.c
+++ b/roff.c
@@ -1223,16 +1223,12 @@ deroff(char **dest, const struct roff_node *n)
 		return;
 	}
 
-	/* Skip leading whitespace and escape sequences. */
+	/* Skip leading whitespace. */
 
-	cp = n->string;
-	while (*cp != '\0') {
-		if ('\\' == *cp) {
-			cp++;
-			mandoc_escape((const char **)&cp, NULL, NULL);
-		} else if (isspace((unsigned char)*cp))
+	for (cp = n->string; *cp != '\0'; cp++) {
+		if (cp[0] == '\\' && strchr(" %&0^|~", cp[1]) != NULL)
 			cp++;
-		else
+		else if ( ! isspace((unsigned char)*cp))
 			break;
 	}