Rename "print-X.out" and "print-XX.out" to "print-capX.otu" and

"print-capXX.out", so that they don't collide with "print-x.out" and
"print-xx.out" on systems with case-insensitive file systems (not only
are modern Windows file systems case-insensitive but case-preserving,
so, by default, is HFS+ on OS X, so you can even have case-insensitivity
on UN*X systems).

diff --git a/tests/print-X.out b/tests/print-capX.out
similarity index 100%
rename from tests/print-X.out
rename to tests/print-capX.out

diff --git a/tests/print-XX.out b/tests/print-capXX.out
similarity index 100%
rename from tests/print-XX.out
rename to tests/print-capXX.out