Fixes README display issue

README.md

@@ -99,7 +99,7 @@ There are a number of special forms in the language that will allow, for example
     <li><code>(load [filepath: string...])</code>: <code>symbol</code></li>
     <li><code>(load-mod [filepath: string...])</code>: <code>symbol</code></li>
     <li><code>(load-mod-file [filepath: string...])</code>: <code>symbol</code></li>
-    <li><code>(usage [symbol|string]): <code>()</code> Will display usage information for the given procedure or runtime value</li>
+    <li><code>(usage [symbol|string])</code>: <code>()</code> Will display usage information for the given procedure or runtime value</li>
   </ul>
 </details>
 

lib.go

@@ -29,6 +29,8 @@ var stdLibrary = vars{
 	"stdin": &IOHandle{os.Stdin, true, "file (read-only)"},
 	"stdout": &IOHandle{os.Stdout, true, "file (write-only)"},
 	"stderr": &IOHandle{os.Stderr, true, "file (write-only)"},
+	// TODO add /dev/null
+	// TODO add env pathlookup
 	"PI": number(math.Pi),
 	"E":  number(math.E),
 	"sys-args": func(a ...expression) expression {
@@ -2079,7 +2081,6 @@ var stdLibrary = vars{
 				if b, ok := a[2].(bool); !ok || (ok && b) {
 					return exception("'subprocess' was given an error redirection that is not an IOHandle or the boolean '#f'")
 				}
-				return exception("'subprocess' was given an error redirection that is not an IOHandle")
 			} else if !e1.Open {
 				return exception("'subprocess' was given an error redirection IOHandle that is already closed")
 			}