add just one more 'word' test, extract steps to delete from search list into a reusable function (don't need to memorise the steps), and fix bug in cursor.sml where we were looking at tl without calculating correct strIdx

fcore/app-update.sml

@@ -363,6 +363,16 @@ struct
 
   (* text-delete functions *)
   (** equivalent of vi's 'x' command **)
+
+  fun deleteSearchList (cursorIdx, length, searchString, searchList, buffer) = 
+  let
+            val searchList = SearchList.delete (cursorIdx, length, searchString, searchList)
+            val searchList = SearchList.mapFrom (cursorIdx, ~length, searchList)
+  in
+              BuildSearchList.fromRange 
+                (cursorIdx, length, buffer, searchString, searchList)
+  end
+
   fun helpRemoveChr (app: app_type, buffer, searchList, cursorIdx, count) =
     if count = 0 then
       let
@@ -423,11 +433,8 @@ struct
             val {searchString, ...} = app
             val buffer = LineGap.delete (cursorIdx, 1, buffer)
 
-            val searchList = SearchList.delete (cursorIdx, 1, searchString, searchList)
-            val searchList = SearchList.mapFrom (cursorIdx, ~1, searchList)
             val (buffer, searchList) = 
-              BuildSearchList.fromRange 
+              deleteSearchList (cursorIdx, 1, searchString, searchList, buffer)
-                (cursorIdx, 1, buffer, searchString, searchList)
 
             val cursorIdx =
               if
@@ -443,11 +450,8 @@ struct
             val {searchString, ...} = app
             val buffer = LineGap.delete (cursorIdx, 1, buffer)
 
-            val searchList = SearchList.delete (cursorIdx, 1, searchString, searchList)
-            val searchList = SearchList.mapFrom (cursorIdx, ~1, searchList)
             val (buffer, searchList) = 
-              BuildSearchList.fromRange 
+              deleteSearchList (cursorIdx, 1, searchString, searchList, buffer)
-                (cursorIdx, 1, buffer, searchString, searchList)
           in 
             helpRemoveChr (app, buffer, searchList, cursorIdx, count - 1)
           end

fcore/cursor.sml

@@ -1732,7 +1732,8 @@ struct
               (* strIdx is in tl *)
               (case tl of
                 tlhd :: tltl =>
-                  helpIsNextChrEndOfLine (strIdx, tlhd, tltl)
+                  helpIsNextChrEndOfLine 
+                    (strIdx - String.size hd, tlhd, tltl)
               | [] =>
                   (* strIdx is at end of lineGap
                    * which also means at end of line *)

test/test.sml

@@ -730,6 +730,22 @@ val wMove = describe "move motion 'w'"
          in
            Expect.isTrue (cursorChr = #"7")
          end)
+
+  , test "moves cursor to first alphanumeric char when in punctuation" (fn _ =>
+      let
+        (* arrange *)
+        val buffer = LineGap.fromString "!!! hello\n"
+        val app = AppType.init (buffer, 0, 0)
+
+        (* act *)
+        val (app1, _) = AppUpdate.update (app, CHAR_EVENT #"w")
+
+        (* assert *)
+        val startsAtExc = getChr app = #"!"
+        val movedToH = getChr app1 = #"h"
+      in
+        Expect.isTrue (startsAtExc andalso movedToH)
+      end)
   ]
 
 val tests = concat [hMove, lMove, jMove, kMove, wMove]