Babel emits errors when running compile_catalog

[mitya57]

Describe the bug
When building Sphinx 4.0.0 package in Debian, I get these errors from babel:

error: sphinx/locale/zh_CN/LC_MESSAGES/sphinx.po:2924: positional format placeholders are unbalanced
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:387: incompatible format for placeholder 1: 'r' and 's' are not compatible
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:1589: incompatible format for placeholder 1: 's' and 'r' are not compatible
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:2323: incompatible format for placeholder 1: 'r' and 's' are not compatible
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:2861: incompatible format for placeholder 1: 's' and 'r' are not compatible
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:2866: incompatible format for placeholder 1: 's' and 'r' are not compatible
error: sphinx/locale/fa/LC_MESSAGES/sphinx.po:2887: incompatible format for placeholder 1: 's' and 'r' are not compatible
error: sphinx/locale/ar/LC_MESSAGES/sphinx.po:643: positional format placeholders are unbalanced
error: sphinx/locale/ar/LC_MESSAGES/sphinx.po:911: placeholders are incompatible

To Reproduce
Steps to reproduce the behavior:

• Clone Sphinx repository or unpack Sphinx 4.0.0 tarball.
• Run python3 setup.py compile_catalog.

Environment info

• OS: Debian GNU/Linux unstable
• Python version: 3.9.2
• Sphinx version: 4.0.0
• Extra tools: Babel 2.8.0

[mitya57]

Cc @hadi-f90 who is the author of Persian translation (I think).

[hadi-f90]

Well... main "Sphinx.po" file only includes 739 expressions to translate. I don't know which expressions does these numbers refer to. I'll fix as soon as I find the reference of numbers.

[mitya57]

The lines causing problems are:

#: sphinx/registry.py:232
#, python-format
msgid "The %r object_type is already registered"
msgstr "نوع شیئ(object_type) ٪r قبلاً برای دامنه %s ثبت شده"

#: sphinx/cmd/quickstart.py:367 sphinx/ext/apidoc.py:87
#, python-format
msgid "File %s already exists, skipping."
msgstr "پرونده‌ی %r در حال حاضر وجود دارد، رد شدن."

#: sphinx/environment/__init__.py:504
#, python-format
msgid "Domain %r is not registered"
msgstr "دامنه ی %s ثبت نشده"

#: sphinx/ext/autodoc/__init__.py:2570
#, python-format
msgid "Failed to get a function signature for %s: %s"
msgstr "شکست در دریافت امضای تابع برای %r: مؤلّفه پیدا نشد: %s"

#: sphinx/ext/autodoc/__init__.py:1531
#, python-format
msgid "Failed to get a constructor signature for %s: %s"
msgstr "شکست در دریافت امضای سازنده‌ی شیئ برای %r: مؤلّفه پیدا نشد: %s"

#: sphinx/ext/autodoc/__init__.py:2064 sphinx/ext/autodoc/__init__.py:2158
#, python-format
msgid "Failed to get a method signature for %s: %s"
msgstr "شکست در دریافت امضای شگرد برای %r: مؤلّفه پیدا نشد: %s"

[tk0miya]

I modified the translation errors (by removing strings or updating .po file directly) in #9206.
But I did not modified them on transifex.