Rename '<sh-define>' to '<sh-defun>' and simplify

This change is already in the syntax document.

* geesh/parser.scm (make-parser): Rename '<sh-define>' to '<sh-defun>'
and use the function name directly instead of making it a singleton
list.
* tests/parser.scm: Update tests.
* .dir-locals.el: Update indentation.

.dir-locals.el

@@ -1,7 +1,7 @@
 ((scheme-mode
   .
   ((eval . (put '<sh-case> 'scheme-indent-function 1))
-   (eval . (put '<sh-define> 'scheme-indent-function 1))
+   (eval . (put '<sh-defun> 'scheme-indent-function 1))
    (eval . (put '<sh-exec-let> 'scheme-indent-function 1))
    (eval . (put '<sh-for> 'scheme-indent-function 1))
    (eval . (put '<sh-until> 'scheme-indent-function 1))

geesh/parser.scm

@@ -444,7 +444,7 @@ the same number of times.)"
 
    (function-definition
     (fname LPAREN! RPAREN! linebreak function-body)
-    : `(<sh-define> (,$1) ,$5))
+    : `(<sh-defun> ,$1 ,$5))
 
    (function-body
     (compound-command)

tests/parser.scm

@@ -304,7 +304,7 @@
 ;; Functions
 
 (test-equal "Parses functions"
-  '(<sh-define> ("foo")
+  '(<sh-defun> "foo"
      (<sh-exec> "echo" "foo"))
   (parse "foo() { echo foo; }"))