writeln Function while reading a Text File is printing appending text "before text" and "after text" at the same position

[BoQsc via Digitalmars-d-learn]

C:\Users\vaida\Desktop\Associative Array Sorting> rdmd 
testingGround.d
0.  The quick brown fox jumps over the lazy dog
nonononoahahahaha Sphinx of black quartz, judge my vow.
2. # How vexingly quick daft zebras jump!
3. # The five boxing wizards jump quickly
4. # Maecenas consectetur risus a lacus sodales iaculis.
5. # Morbi sed tortor sollicitudin, pharetra massa egestas, 
congue massa.
6. # Sed sit amet nisi at ligula ultrices posuere quis nec est.
7. # Mauris vel purus viverra, pellentesque elit id, consequat 
felis.

Here you can see ". hahahahahahaha" and "nononono" and even 
lineNumber is being merged into the same position. Why is this 
happening and can this be simply resolved?


testingGround.d
import std.stdio;
import std.algorithm;

int lineNumber;
void main(){

        File exampleFile = File("exampleText.txt");
        lineNumber = 0;
        foreach(line; exampleFile.byLine){
                
                if (line == " Sphinx of black quartz, judge my vow.\u000D"){
                        writeln(lineNumber, ". hahahahahahaha", line, 
"nononono");
                        
                } else {
                        writeln( lineNumber, ". ", line);
                }
                
                lineNumber++;
        }
}

exampleText.txt
 The quick brown fox jumps over the lazy dog
 Sphinx of black quartz, judge my vow.
# How vexingly quick daft zebras jump!
# The five boxing wizards jump quickly
# Maecenas consectetur risus a lacus sodales iaculis.
# Morbi sed tortor sollicitudin, pharetra massa egestas, congue 
massa.
# Sed sit amet nisi at ligula ultrices posuere quis nec est.
# Mauris vel purus viverra, pellentesque elit id, consequat 
felis.