Allow U+F8FF to be typed

U+F8FF is the last character in the private use area, but it's also the
codepoint used for the Apple symbol (), which is typeable on US
keyboards in OS X, and so should actually work.

reader.cpp

@@ -3002,10 +3002,13 @@ static int can_read(int fd)
 /**
    Test if the specified character is in the private use area that
    fish uses to store internal characters
+
+    Note: Allow U+F8FF because that's the Apple symbol, which is in the
+    OS X US keyboard layout.
 */
 static int wchar_private(wchar_t c)
 {
-    return ((c >= 0xe000) && (c <= 0xf8ff));
+    return ((c >= 0xe000) && (c < 0xf8ff));
 }
 
 /**

tests/generic.expect

@@ -0,0 +1,13 @@
+# vim: set filetype=expect:
+#
+# General tests that don't belong elsewhere
+
+spawn $fish
+
+expect_prompt
+
+# ensure the Apple key () is typeable
+send_line "echo "
+expect_prompt "" {} unmatched {
+    puts stderr "Couldn't type apple key ()"
+}

tests/generic.expect.status

@@ -0,0 +1 @@
+0

tests/interactive.out

@@ -1,2 +1,3 @@
 File bind.expect tested ok
+File generic.expect tested ok
 File read.expect tested ok