Do not scan more characters we actual have.

---
 docs/doc2tex.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- docs/doc2tex.c
+++ docs/doc2tex.c	2024-06-03 07:11:02.870049141 +0000
@@ -553,8 +553,9 @@ puttex( char *str, FILE *file)
                 (void) fputs("}", file);
 		inquote = FALSE;
 	    } else {
+		size_t lmax = strlen(str);
 		(void) fputs("{\\bf ", file);
-		for (i=0; i<MAX_LINE_LEN && ((c=str[i]) != '`') ; i++){
+		for (i=0; i<lmax && ((c=str[i]) != '`') ; i++){
                     string[i] = c;
                 }
 		string[i] = NUL;