TYPO3 Core

Examples for problematic labels:
typo3/sysext/felogin/pi1/locallang.xlf

<trans-unit id="ll_forgot_email_password">
    <source>Your password
        Hi %s

        Your username is "%s" 
        Your password is "%s" 
    </source>
</trans-unit>
<trans-unit id="ll_forgot_email_nopassword">
    <source>Your password
        Hi %s

        We couldn't find a username for this email address and so cannot send the password to you. Probably you misspelled the email address (upper/lower case makes a difference) or maybe you even didn't register yet?
    </source>
</trans-unit>
<trans-unit id="ll_forgot_validate_reset_password">
    <source>Your new password
        Dear %s,

        This email was sent in response to your request to reset your password. Please click on the link below.
        %s

        For security reasons, this link is only active until %s. If you do not visit the link before then, you will need to repeat the password reset steps.
    </source>
</trans-unit>

The first line is in these cases used as subject for the email and all other lines are the body of the mail. Because it's plain text email they should not have whitespace prepended.

Thinking more about this issue:

• We cannot remove tabs at the beginning within TYPO3 or we should either fix it in ll-XML generated files while packaging or we have to update all versions of TYPO3 (not doable)
• If we fix the output in ll-XML while packaging, why not fix it as well for XLIFF files? If Pootle happens to output translated XLF with indent of course, which might not be the case with xml:space="preserve"
• It's easy to fix the source files (in Core) so do it anyway otherwise the labels will contain \t all over the lines in Pootle

Using PhpStorm with regular expression lookahead to remove tabs:

Search for: ^\t+(?![<\t])
Replace by:
For: *.xlf

Solution for English xliff files is great (already voted in Gerrit). Is there anything we can do for translations in Pootle? Can the affected labels be detected in Pootle? Then we can notify the translators to check and fix the translations (e.g. because they have been translated or changed recently and now have whitespace removed).