Tests: (src) Normalization with no args

Closes #293.  Thanks to Akira Komamura (@akirak) for reporting.

README.org

@@ -557,7 +557,7 @@ Simple links may also be written manually in either sexp or non-sexp form, like:
 +  Predicate ~src~ now matches case-insensitively.
 
 *Fixed*
-+  Predicate ~src~'s matching of begin/end block lines, normalization of arguments, and handling in non-sexp queries.
++  Predicate ~src~'s matching of begin/end block lines, normalization of arguments, and handling in non-sexp queries.  (Thanks to [[https://github.com/akirak][Akira Komamura]] for reporting.)
 +  Predicate ~src~'s behavior with various arguments.
 
 *Internal*

org-ql.info

@@ -1049,7 +1049,8 @@ File: README.info,  Node: 07-pre,  Next: 063,  Up: Changelog
 
    *Fixed*
    • Predicate ‘src’’s matching of begin/end block lines, normalization
-     of arguments, and handling in non-sexp queries.
+     of arguments, and handling in non-sexp queries.  (Thanks to Akira
+     Komamura (https://github.com/akirak) for reporting.)
    • Predicate ‘src’’s behavior with various arguments.
 
    *Internal*
@@ -1726,35 +1727,35 @@ Node: Links37140
 Node: Tips37827
 Node: Changelog38151
 Node: 07-pre38934
-Node: 06341323
-Node: 06241858
-Node: 06142163
-Node: 0642731
-Node: 05245785
-Node: 05146085
-Node: 0546508
-Node: 04948037
-Node: 04848317
-Node: 04748666
-Node: 04649075
-Node: 04549483
-Node: 04449844
-Node: 04350203
-Node: 04250406
-Node: 04150567
-Node: 0450814
-Node: 03254915
-Node: 03155318
-Node: 0355515
-Node: 02358815
-Node: 02259049
-Node: 02159329
-Node: 0259534
-Node: 0163612
-Node: Notes63713
-Node: Comparison with Org Agenda searches63875
-Node: org-sidebar64764
-Node: License65043
+Node: 06341399
+Node: 06241934
+Node: 06142239
+Node: 0642807
+Node: 05245861
+Node: 05146161
+Node: 0546584
+Node: 04948113
+Node: 04848393
+Node: 04748742
+Node: 04649151
+Node: 04549559
+Node: 04449920
+Node: 04350279
+Node: 04250482
+Node: 04150643
+Node: 0450890
+Node: 03254991
+Node: 03155394
+Node: 0355591
+Node: 02358891
+Node: 02259125
+Node: 02159405
+Node: 0259610
+Node: 0163688
+Node: Notes63789
+Node: Comparison with Org Agenda searches63951
+Node: org-sidebar64840
+Node: License65119
 
 End Tag Table
 

tests/test-org-ql.el

@@ -325,6 +325,9 @@ with keyword arg NOW in PLIST."
         (it "normalizes non-keyword args with a :lang keyword arg to keywords"
           (expect (org-ql--normalize-query '(src "foo" "bar" :lang "baz"))
                   :to-equal '(src :lang "baz" :regexps '("foo" "bar"))))
+        (it "normalizes zero args without looping"
+          (expect (org-ql--normalize-query '(src))
+                  :to-equal '(src)))
         (it "normalizes all-keyword args without looping"
           (expect (org-ql--normalize-query '(src :regexps ("foo") :lang "bar"))
                   :to-equal '(src :lang "bar" :regexps '("foo")))