fix for output not ending with newline

src/main.c

@@ -62,8 +62,8 @@ void termput1(char *cmd, int arg1) {
 // Read a single line from s and print it out. Once max_display_len is reached,
 // keep scanning for the rest of the line but don't print anymore.
 ssize_t read_line(FILE *s, size_t max_display_len) {
- ssize_t display_len = 0;
- ssize_t len = 0;
+ ssize_t display_len = 0; // number of printed columns
+ ssize_t len = 0; // number of chars read
  for (;;) {
  wchar_t c = fgetwc(s);
  if (c == WEOF) {
@@ -72,6 +72,7 @@ ssize_t read_line(FILE *s, size_t max_display_len) {
  return -1;
  break;
  }
+ ++len;
  if (c == L'\n')
  break;
  int c_len = wcwidth(c);