Repository: pypa/pip
File: src/pip/_internal/resolution/resolvelib/factory.py (Python)

Code before:

        relevant_constraints = set()
        for req, parent in e.causes:
            if req.name in constraints:
                relevant_constraints.add(req.name)
            msg = msg + "\n    "
            if parent:
                msg = msg + f"{parent.name} {parent.version} depends on "
            else:
                msg = msg + "The user requested "
            msg = msg + req.format_for_error()
        for key in relevant_constraints:
            spec = constraints[key].specifier
            msg += f"\n    The user requested (constraint) {key}{spec}"

        # Check for causes that had no candidates
        causes = set()
        for req, _ in e.causes:
            causes.add(req.name)

        no_candidates = {c for c in causes if not self._has_any_candidates(c)}
        if no_candidates:
            msg = (
                msg
                + "\n\n"
                + "Additionally, some projects in these conflicts have no "
                + "matching distributions available for your environment:"
                + "\n    "
                + "\n    ".join(sorted(no_candidates))
            )

        msg = (
            msg
            + "\n\n"
            + "To fix this you could try to:\n"
            + "1. loosen the range of package versions you've specified\n"
            + "2. remove package versions to allow pip to attempt to solve "
            + "the dependency conflict\n"
        )

        logger.info(msg)

        return DistributionNotFound(
            "ResolutionImpossible: for help visit "
            "https://pip.pypa.io/en/latest/topics/dependency-resolution/"
            "#dealing-with-dependency-conflicts"
        )


Review comment (suggestion):
```suggestion
                + "Additionally, some packages in these conflicts have no "
```

While internally we use the terms "project" and "packages" interchangeably, I think that we primarily[^1] use "package" in any user-facing output.


[^1]: The main exception (I'm aware of) is that we sometimes use "project" when installing from a local directory. 

Code after:
        else:
            info = "the requested packages"

        msg = (
            f"Cannot install {info} because these package versions "
            "have conflicting dependencies."
        )
        logger.critical(msg)
        msg = "\nThe conflict is caused by:"

        relevant_constraints = set()
        for req, parent in e.causes:
            if req.name in constraints:
                relevant_constraints.add(req.name)
            msg = msg + "\n    "
            if parent:
                msg = msg + f"{parent.name} {parent.version} depends on "
            else:
                msg = msg + "The user requested "
            msg = msg + req.format_for_error()
        for key in relevant_constraints:
            spec = constraints[key].specifier
            msg += f"\n    The user requested (constraint) {key}{spec}"

        # Check for causes that had no candidates
        causes = set()
        for req, _ in e.causes:
            causes.add(req.name)

        no_candidates = {c for c in causes if not self._has_any_candidates(c)}
        if no_candidates:
            msg = (
                msg
                + "\n\n"
                + "Additionally, some packages in these conflicts have no "
                + "matching distributions available for your environment:"
                + "\n    "
                + "\n    ".join(sorted(no_candidates))
            )

        msg = (
            msg
            + "\n\n"
            + "To fix this you could try to:\n"
            + "1. loosen the range of package versions you've specified\n"
            + "2. remove package versions to allow pip to attempt to solve "
            + "the dependency conflict\n"
        )

        logger.info(msg)