If i got something like this (code tags forgotten), taken from: "animal": 
                                   10: use Data::Dumper;
                               11:
                                 12: my $info = "dog";
                                   13:
                                     14: {
                                       15:   try($info);

[download]

Pseudo Code:

foreach {
("^    ")  && | [[0-99]:];
print "";
}

[download]

Explanation/Condition: If the first 3 characters of the line are whitespaces and/or a number followed by":" do replace whitespace and numbers by "" empty string?

Now the question is: How do i have to use awk and sed e.g. or what would you suggest is effective to accomplish this?.

Sure i could delete it all manually but since this is a common stupid problem and i need to practice my poor "skills" ...

"Disclaimer: The word "messy" is only meant in context of the formatting if copied not regarding the content"

Update: solved, done in bash/shell again: 
sed s/^[ \t]*// #remove leading whitespaces
sed s/^[0-9]*//g #remove leading numbers
sed s/^:*//g  #remove leading ":"

[download]
Thx Corion
/update:

Thanks in Advance
MH

In reply to Clean Up downloaded "messy" script? by matze77

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