remove calls to ptln() in order to remove deprecation warnings

[ChaosKid42]

This PR remove calls to ptln() which cause deprecation warnings.

[michitux]

In PHP, echo is a statement and not a function. The manual explicitly advices against this function-like syntax even though it is valid when using just a single argument. Also, I think while you paid attention to keep the spaces intact, this removes all line breaks in the output. I didn't check if this has any effect, but I believe either both spaces and line breaks should be preserved, or none of them. I don't see the point in keeping spaces for indentation without line breaks between the lines.

[ChaosKid42]

In PHP, echo is a statement and not a function. The manual explicitly advices against this function-like syntax even though it is valid when using just a single argument. Also, I think while you paid attention to keep the spaces intact, this removes all line breaks in the output. I didn't check if this has any effect, but I believe either both spaces and line breaks should be preserved, or none of them. I don't see the point in keeping spaces for indentation without line breaks between the lines.

@michitux You are right. I tried another approach.