I think this patch is better than what is already in 'next', so let
me see if I can make it into an incremental update.

We'd need your sign-off, of course.

-- >8 --
Subject: i18n: unpack-trees: avoid substituting only a verb in sentences

Instead of reusing the same set of message templates for checkout
and other actions and substituting the verb with "%s", prepare
separate message templates for each known action.  That would make
it easier for translation into languages where the same verb may
conjugate differently depending on the message we are giving.

---

diff --git a/unpack-trees.c b/unpack-trees.c
index 4bc6b4f..edb1ee5 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -58,27 +58,61 @@ void setup_unpack_trees_porcelain(struct 
unpack_trees_options *opts,
        int i;
        const char **msgs = opts->msgs;
        const char *msg;
-       const char *cmd2 = strcmp(cmd, "checkout") ? cmd : "switch branches";
 
-       if (advice_commit_before_merge)
-               msg = _("Your local changes to the following files would be 
overwritten by %s:\n%%s"
-                       "Please, commit your changes or stash them before you 
can %s.");
+       if (!strcmp(cmd, "checkout"))
+               msg = advice_commit_before_merge
+                     ? _("Your local changes to the following files would be 
overwritten by checkout:\n%%s"
+                         "Please, commit your changes or stash them before you 
can switch branches.")
+                     : _("Your local changes to the following files would be 
overwritten by checkout:\n%%s");
+       else if (!strcmp(cmd, "merge"))
+               msg = advice_commit_before_merge
+                     ? _("Your local changes to the following files would be 
overwritten by merge:\n%%s"
+                         "Please, commit your changes or stash them before you 
can merge.")
+                     : _("Your local changes to the following files would be 
overwritten by merge:\n%%s");
        else
-               msg = _("Your local changes to the following files would be 
overwritten by %s:\n%%s");
+               msg = advice_commit_before_merge
+                     ? _("Your local changes to the following files would be 
overwritten by %s:\n%%s"
+                         "Please, commit your changes or stash them before you 
can %s.")
+                     : _("Your local changes to the following files would be 
overwritten by %s:\n%%s");
        msgs[ERROR_WOULD_OVERWRITE] = msgs[ERROR_NOT_UPTODATE_FILE] =
-               xstrfmt(msg, cmd, cmd2);
+               xstrfmt(msg, cmd, cmd);
 
        msgs[ERROR_NOT_UPTODATE_DIR] =
                _("Updating the following directories would lose untracked 
files in it:\n%s");
 
-       if (advice_commit_before_merge)
-               msg = _("The following untracked working tree files would be %s 
by %s:\n%%s"
-                       "Please move or remove them before you can %s.");
+       if (!strcmp(cmd, "checkout"))
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
removed by checkout:\n%%s"
+                         "Please move or remove them before you can switch 
branches.")
+                     : _("The following untracked working tree files would be 
removed by checkout:\n%%s");
+       else if (!strcmp(cmd, "merge"))
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
removed by merge:\n%%s"
+                         "Please move or remove them before you can merge.")
+                     : _("The following untracked working tree files would be 
removed by merge:\n%%s");
        else
-               msg = _("The following untracked working tree files would be %s 
by %s:\n%%s");
-
-       msgs[ERROR_WOULD_LOSE_UNTRACKED_REMOVED] = xstrfmt(msg, "removed", cmd, 
cmd2);
-       msgs[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN] = xstrfmt(msg, 
"overwritten", cmd, cmd2);
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
removed by %s:\n%%s"
+                         "Please move or remove them before you can %s.")
+                     : _("The following untracked working tree files would be 
removed by %s:\n%%s");
+       msgs[ERROR_WOULD_LOSE_UNTRACKED_REMOVED] = xstrfmt(msg, cmd, cmd);
+
+       if (!strcmp(cmd, "checkout"))
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
overwritten by checkout:\n%%s"
+                         "Please move or remove them before you can switch 
branches.")
+                     : _("The following untracked working tree files would be 
overwritten by checkout:\n%%s");
+       else if (!strcmp(cmd, "merge"))
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
overwritten by merge:\n%%s"
+                         "Please move or remove them before you can merge.")
+                     : _("The following untracked working tree files would be 
overwritten by merge:\n%%s");
+       else
+               msg = advice_commit_before_merge
+                     ? _("The following untracked working tree files would be 
overwritten by %s:\n%%s"
+                         "Please move or remove them before you can %s.")
+                     : _("The following untracked working tree files would be 
overwritten by %s:\n%%s");
+       msgs[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN] = xstrfmt(msg, cmd, cmd);
 
        /*
         * Special case: ERROR_BIND_OVERLAP refers to a pair of paths, we
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