Made spelling suggestion case sensitive

... and fixed a bug in the test data.

This reduced the count of failures in the Suggestion.spellingSuggestions
unit test from 8 to 1:

[ RUN      ] Suggestion.spellingSuggestions
Resolve redirect
set index
test/suggestion.cpp:841: Failure
Expected equality of these values:
  getSpellingSuggestions(a, "Lax", 1)
    Which is: {}
  std::vector<std::string> ({"Lachs"})
    Which is: { "Lachs" }
[  FAILED  ] Suggestion.spellingSuggestions (260 ms)

The spelling correction "Lax -> Lachs" is not returned because the max
edit distance is capped at (length(query_word) - 1) which reduces our
passed value of the max edit distance argument from 3 to 2. It is not
clear why the client's test works.

Author: veloman-yunkan

src/suggestion.cpp

@@ -406,7 +406,7 @@ const TermCollection& SuggestionDataBase::getAllSuggestionTerms() const
 }
 
 SuggestionSearch::Results SuggestionSearch::getSpellingSuggestions(uint32_t maxCount) const {
-  QueryInfo queryInfo(removeAccents(m_query));
+  QueryInfo queryInfo(m_query);
 
   SuggestionSearch::Results r;
   if ( !queryInfo.wordBeingEdited().empty() ) {

test/suggestion.cpp

@@ -785,7 +785,7 @@ TEST(Suggestion, spellingSuggestions) {
       "Umweltstandard",
       "Unfug",
       "Wohnzimmer",
-      "Zunge"
+      "Zunge",
       "aber",
       "abonnieren",
       "amtieren",