tiny enhancement for content model error reports (#157190, #143948).

* xmlschemas.c: tiny enhancement for content model error reports (#157190, #143948).
  Removed abbreviations: CT, ST and WC (#157190, reported by Frans  Englich).
  Initial: no report of local components.
* result/schemas/all* result/schemas/any3_0_0.err result/schemas/choice*
  result/schemas/cos-st-restricts-1-2-err_0_0.err result/schemas/derivation-ok-extension-err_0_0.err
  result/schemas/derivation-ok-extension_0_0.err result/schemas/derivation-ok-restriction-2-1-1_0_0.err
  result/schemas/derivation-ok-restriction-4-1-err_0_0.err result/schemas/deter0_0_0.err
  result/schemas/extension1_0_2.err result/schemas/facet-unionST-err1_0_0.err
  result/schemas/hexbinary_0_1.err result/schemas/list* result/schemas/restriction-attr1_0_0.err
  result/schemas/vdv-first4_0_1.err result/schemas/vdv-first4_0_2.err: Adapted output.
diff --git a/result/schemas/choice_1_3.err b/result/schemas/choice_1_3.err
index 95089b3..ece5d69 100644
--- a/result/schemas/choice_1_3.err
+++ b/result/schemas/choice_1_3.err
@@ -1 +1 @@
-./test/schemas/choice_3.xml:1: element doc: Schemas validity error : Element 'doc' [CT local]: The element content is not valid.
+./test/schemas/choice_3.xml:3: element a: Schemas validity error : Element 'a': This element is not expected.