ASCII files are read incorrectly if EOL characters are missing

[yruslan]

Describe the bug

Although this is a very rare corner case, it would be nice to fix it.

To Reproduce

    //Text file = "AABBCC"
    val df = spark
      .read
      .format("cobol")
      .option("copybook_contents", copybook)
      .option("pedantic", "true")
      .option("record_format", "D")
      .load("MyTextFile.txt")
   df.show

Got

+---+
|  A|
+---+
| AB|
| CC|
+---+

Expected

+---+
|  A|
+---+
| AA|
| BB|
| CC|
+---+