refactor(commands): move user command tests

This commit just shuffles the test for user commands closer to the
definition of the user commands.

src/commands.zig

@@ -53,6 +53,37 @@ pub const UserCommand = union(enum) {
     }
 };
 
+test "can parse !help successful" {
+    try std.testing.expectEqual(
+        UserCommand.help,
+        UserCommand.parse("jassob", "!help"),
+    );
+}
+
+test "can parse s/hello/world/ successful" {
+    try std.testing.expectEqualDeep(
+        UserCommand{ .substitute = .{
+            .author = "jassob",
+            .needle = "hello",
+            .replacement = "world",
+            .all = false,
+        } },
+        UserCommand.parse("jassob", "s/hello/world/"),
+    );
+}
+
+test "can parse s/hello/world and report failure" {
+    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "s/hello/world"));
+}
+
+test "can parse s/hello|world| and report failure" {
+    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "s/hello/world"));
+}
+
+test "correctly ignores non-messages when trying to parse" {
+    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "Hello, world"));
+}
+
 /// AdminCommand are commands useful for debugging zigeru, since they
 /// are more spammy than others they are separated and only sent to
 /// #eru-admin.
@@ -91,37 +122,6 @@ pub const AdminCommand = union(enum) {
     }
 };
 
-test "can parse !help successful" {
-    try std.testing.expectEqual(
-        UserCommand.help,
-        UserCommand.parse("jassob", "!help"),
-    );
-}
-
-test "can parse s/hello/world/ successful" {
-    try std.testing.expectEqualDeep(
-        UserCommand{ .substitute = .{
-            .author = "jassob",
-            .needle = "hello",
-            .replacement = "world",
-            .all = false,
-        } },
-        UserCommand.parse("jassob", "s/hello/world/"),
-    );
-}
-
-test "can parse s/hello/world and report failure" {
-    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "s/hello/world"));
-}
-
-test "can parse s/hello|world| and report failure" {
-    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "s/hello/world"));
-}
-
-test "correctly ignores non-messages when trying to parse" {
-    try std.testing.expectEqualDeep(null, UserCommand.parse("jassob", "Hello, world"));
-}
-
 test "parse admin commands" {
     const cmd = AdminCommand.parse("!join badchannel") orelse unreachable;
     try std.testing.expectEqual(