nimsuggest supports include files properly; added the compiler itself as a testcase

tools/nimsuggest/nimsuggest.nim

@@ -157,13 +157,11 @@ proc execute(cmd: IdeCmd, file, dirtyfile: string, line, col: int;
       dirtyfile.len == 0:
     discard "no need to recompile anything"
   else:
-    #resetModule dirtyIdx
-    #if dirtyIdx != gProjectMainIdx:
-    #  resetModule gProjectMainIdx
-    graph.markDirty dirtyIdx
-    graph.markClientsDirty dirtyIdx
+    let modIdx = graph.parentModule(dirtyIdx)
+    graph.markDirty modIdx
+    graph.markClientsDirty modIdx
     if gIdeCmd != ideMod:
-      graph.compileProject(cache, dirtyIdx)
+      graph.compileProject(cache, modIdx)
   if gIdeCmd in {ideUse, ideDus}:
     let u = if suggestVersion >= 2: graph.symFromInfo(gTrackPos) else: usageSym
     if u != nil:

tools/nimsuggest/tests/tinclude.nim

@@ -0,0 +1,7 @@
+discard """
+$nimsuggest --tester compiler/nim.nim
+>def compiler/semexprs.nim:13:50
+def;;skType;;ast.PSym;;PSym;;*ast.nim;;668;;2;;"";;100
+>def compiler/semexprs.nim:13:50
+def;;skType;;ast.PSym;;PSym;;*ast.nim;;668;;2;;"";;100
+"""