Add more reader conditional tests

Signed-off-by: James Hamlin <jfhamlin@gmail.com>

Author: jfhamlin

pkg/reader/reader.go

@@ -1301,10 +1301,6 @@ func (r *Reader) readConditional(eofOK bool, stopRune rune) (any, error) {
 	return form, nil
 }
 
-// Test cases: topLevel splicing; multiple spliced forms; last form is
-// non-matching conditional; odd number of forms; nested splice; conditional at end of collection;
-// conditional at end of input;
-
 // hasFeature reports whether the reader has the given reader
 // conditional feature.
 func (r *Reader) hasFeature(feat any) (bool, error) {

pkg/reader/testdata/reader/readcondunusual.glj

@@ -1,6 +1,8 @@
 ;; skip-clj
 [^#?@(:glj [:foo 'symbol])]
 
+[#?@(:glj [splice with #?@(:glj [a nested splice])])]
+
 [#?(:clj [no match at end of collection])]
 
 #?(:clj [no match at end of input])

pkg/reader/testdata/reader/readcondunusual.out

@@ -1,2 +1,3 @@
 [(quote symbol)]
+[splice with a nested splice]
 []

pkg/reader/testdata/reader_error/oddconditional.glj

@@ -0,0 +1,2 @@
+;;;ERROR: <unknown-file>:2:18: read-cond requires an even number of forms
+#?(:clj :foo :glj)