Merge pull request #102 from jacwah/sub-sep

Don't allow :s delimiters not allowed by vim

lib/ex.coffee

@@ -199,9 +199,9 @@ class Ex
   substitute: (range, args) ->
     args = args.trimLeft()
     delim = args[0]
-    if /[a-z]/i.test(delim)
+    if /[a-z1-9\\"|]/i.test(delim)
       throw new CommandError(
-        "Regular expressions can't be delimited by letters")
+        "Regular expressions can't be delimited by alphanumeric characters, '\\', '\"' or '|'")
     delimRE = new RegExp("[^\\\\]#{delim}")
     spl = []
     args_ = args[1..]

spec/ex-commands-spec.coffee

@@ -449,13 +449,20 @@ describe "the commands", ->
       submitNormalModeInputText(':%substitute/abc/ghi/ig')
       expect(editor.getText()).toEqual('ghiaghi\ndefdDEF\nghiaghi')
 
-    it "can't be delimited by letters", ->
+    describe "illegal delimiters", ->
+      test = (delim) ->
         keydown(':')
-      submitNormalModeInputText(':substitute nanxngi')
+        submitNormalModeInputText(":substitute #{delim}a#{delim}x#{delim}gi")
         expect(atom.notifications.notifications[0].message).toEqual(
-        "Command error: Regular expressions can't be delimited by letters")
+          "Command error: Regular expressions can't be delimited by alphanumeric characters, '\\', '\"' or '|'")
         expect(editor.getText()).toEqual('abcaABC\ndefdDEF\nabcaABC')
 
+      it "can't be delimited by letters", -> test 'n'
+      it "can't be delimited by numbers", -> test '3'
+      it "can't be delimited by '\\'",    -> test '\\'
+      it "can't be delimited by '\"'",    -> test '"'
+      it "can't be delimited by '|'",     -> test '|'
+
     describe "capturing groups", ->
       beforeEach ->
         editor.setText('abcaABC\ndefdDEF\nabcaABC')