fix line count for files that don't end in a newline

Signed-off-by: Derek Stevens <nilix@nilfm.cc>

routes/template.go

@@ -45,15 +45,23 @@ func (d *deps) listFiles(files []git.NiceTree, data map[string]any, w http.Respo
 
 func countLines(r io.Reader) (int, error) {
 	buf := make([]byte, 32*1024)
+	bufLen := 0
 	count := 0
 	nl := []byte{'\n'}
 
 	for {
 		c, err := r.Read(buf)
+		if c > 0 {
+			bufLen += c
+		}
 		count += bytes.Count(buf[:c], nl)
 
 		switch {
 		case err == io.EOF:
+			/* handle last line not having a newline at the end */
+			if bufLen >= 1 && buf[bufLen-1] != '\n' {
+				count++
+			}
 			return count, nil
 		case err != nil:
 			return 0, err