update tests

tests/csv_test.ar

@@ -1,4 +1,4 @@
-import "csv" as csv
+import "csv.ar" as csv
 
 let table = (csv.read("tests/test.csv"))
 

tests/diff.ar

@@ -11,4 +11,4 @@ forever do
     term.log("f"+("'"*d)+"("+x+") = "+n)
     if (n == 0) break
     f = diff(f)
-    d = d + 1
+    d += 1

tests/example.ar

@@ -1,10 +1,7 @@
 let getInitials(name) = do
     name = name.upper()
     namesplit = name.split(" ")
-    i = 0
-    while (i < namesplit.length) do
-        namesplit[i] = namesplit[i][0]
-        i = i + 1
+    for (i from 0 to namesplit.length) namesplit[i] = namesplit[i][0]
     return namesplit.join("")
 
 name = "william bell"