Update spec for multiple selective imports

Author: wilzbach

spec/module.dd

@@ -178,19 +178,15 @@ $(GNAME ImportDeclaration):
 
 $(GNAME ImportList):
     $(I Import)
-    $(I ImportBindings)
     $(I Import) $(D ,) $(I ImportList)
 
 $(GNAME Import):
     $(I ModuleFullyQualifiedName)
     $(I ModuleAliasIdentifier) $(D =) $(I ModuleFullyQualifiedName)
+    $(I ImportBindings)
 
 $(GNAME ImportBindings):
-    $(I Import) $(D :) $(I ImportBindList)
-
-$(GNAME ImportBindList):
-    $(I ImportBind)
-    $(I ImportBind) $(D ,) $(I ImportBindList)
+    $(I Import) $(D :) $(I ImportBind)
 
 $(GNAME ImportBind):
     $(I Identifier)
@@ -407,6 +403,22 @@ void main()
 
 $(P $(D static) cannot be used with selective imports.)
 
+$(P Selective imports can be imported from multiple modules if
+those import are also selective or when the imported module has a qualified name:)
+
+$(SPEC_RUNNABLE_EXAMPLE_COMPILE
+---
+import std.stdio : writeln, std.file : write, std.ascii;
+
+void main()
+{
+    writeln("hello!");           // ok, writeln from std.stdio
+    write("world.txt", "hello"); // ok, write from std.file
+    writeln(digits);             // ok, digits from std.ascii
+}
+---
+)
+
 $(H2 $(LNAME2 renamed_selective_imports, Renamed and Selective Imports))
 
 $(P When renaming and selective importing are combined:)