nimsuggest & tester: many improvements, test new dependency tracking

tools/nimsuggest/tests/tdot3.nim

@@ -0,0 +1,27 @@
+# Test basic module dependency recompilations.
+
+import dep
+
+proc main(f: Foo) =
+  f.#[!]#
+
+# the tester supports the spec section at the bottom of the file and
+# this way, the line numbers more often stay the same
+
+discard """
+!copy dep_v1.nim dep.nim
+$nimsuggest --tester $file
+>sug $1
+sug;;skField;;x;;int;;*dep.nim;;8;;4;;"";;100
+sug;;skField;;y;;int;;*dep.nim;;8;;8;;"";;100
+sug;;skProc;;tdot3.main;;proc (f: Foo);;$file;;5;;5;;"";;100
+
+!copy dep_v2.nim dep.nim
+>mod $path/dep.nim
+>sug $1
+sug;;skField;;x;;int;;*dep.nim;;8;;4;;"";;100
+sug;;skField;;y;;int;;*dep.nim;;8;;8;;"";;100
+sug;;skField;;z;;string;;*dep.nim;;9;;4;;"";;100
+sug;;skProc;;tdot3.main;;proc (f: Foo);;$file;;5;;5;;"";;100
+!del dep.nim
+"""