unary minus must not have any whitespace after it

avoids precedence ambiguity between minus with fncall

moonscript/parse.lua

@@ -35,6 +35,7 @@ local Indent = C(S"\t "^0) / count_indent
 
 local Comment = P"--" * (1 - S"\n")^0 * #Stop
 local Space = _Space * Comment^-1
+local SomeSpace = S" \t"^1 * Comment^-1
 
 local _Name = C(R("az", "AZ", "__") * R("az", "AZ", "09", "__")^0)
 local Name = Space * _Name
@@ -279,7 +280,7 @@ local build_grammar = wrap(function()
 
 		Value =
 			If +
-			sym"-" * Exp / mark"minus" +
+			sym"-" * -SomeSpace * Exp / mark"minus" +
 			sym"#" * Exp / mark"length" +
 			sym"not" * Exp / mark"not" +
 			TableLit +
@@ -407,12 +408,3 @@ function string(str)
 	return g:match(str)
 end
 
-local program3 = [[
--- hello
-class Hello
-	@something: 2323
-
-	hello: () ->
-		print 200
-]]
-

tests/inputs/syntax.moon

@@ -159,3 +159,12 @@ hello =
   good: 230203
 
 
+5 + what wack
+what whack + 5
+
+5 - what wack
+what whack - 5
+
+x = hello - world - something
+
+

tests/outputs/syntax.lua

@@ -118,4 +118,9 @@ local hello = {
   ["else"] = 3434,
   ["function"] = "okay",
   good = 230203
-}
+}
+_ = 5 + what(wack)
+what(whack + 5)
+_ = 5 - what(wack)
+what(whack - 5)
+x = hello - world - something