-0,1181779 -0,1200798 -0,1219472 -0,1237641 ...
-0,1198357 -0,1216468 -0,1234369 -0,12518  ...
-0,1214746 -0,1232006 -0,1249159 -0,1265796 ...
-0,1230453 -0,124699 -0,1263358 -0,127923 ...
-0,1245125 -0,1260881 -0,1276485 -0,1291577 ...
-0,1258181 -0,1273194 -0,1288035 -0,1302358 ...
-0,1269251 -0,1283569 -0,1297709 -0,1311328 ...
-0,1278204 -0,129187 -0,1305349 -0,1318302 ...
... and so on, may have hunderds of rows and columns ...

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "regexp"
)

func main() {
    file_dB, err := os.Open("d:/dB.txt")
    if err != nil {
        fmt.Printf("error opening file: %vn", err)
        os.Exit(1)
    }
    file_dL, err := os.Open("d:/dL.txt")
    if err != nil {
        fmt.Printf("error opening file: %vn", err)
        os.Exit(1)
    }
    file_out, err := os.Create("d:/out.txt") // also rewrite existing !
    if err != nil {
        fmt.Printf("error opening file: %vn", err)
        os.Exit(1)
    }

    dB := bufio.NewReader(file_dB)
    dL := bufio.NewReader(file_dL)

    err = nil
    i := 1

    for {
        line1, _, err := dB.ReadLine()
        if len(line1) > 0 && line1[len(line1)-1] == 'n' {
            line1 = line1[:len(line1)-1]
        }
        line2, _, err := dL.ReadLine()
        if len(line2) > 0 && line2[len(line2)-1] == 'n' {
            line2 = line2[:len(line2)-1]
        }
        if len(line1) == 0 || len(line2) == 0 || err == io.EOF {
            fmt.Println("Total lines done: ", i)
            break
        } else if err != nil {
            fmt.Printf("Error while reading files: %vn", err)
            os.Exit(1)
        }
        i++
        str := string(line1) + ";" + string(line2) + "n"
        if _, err := file_out.WriteString(str); err != nil {
            panic(err)
        }
    }
}

-0.129617;-0.118178
-0.128609;-0.120080
-0.127623;-0.121947
-0.126669;-0.123764
-0.125775;-0.125484
-0.124970;-0.127045
-0.124267;-0.128414
-0.123666;-0.129569