Bug 7518: certain searches with quotation marks don't work

Under certain circumstance, a search term without quotation marks
returns the expected results while the same search with a
double quote embedded in it would fail.

Koha should ignore the quotation marks and return results anyway.

This appears when  QueryWeightFields syspref is activated (and
QueryAutoTruncate is off), as field weighting builds a complex CCL
query using double quotes around search words.  This patch simply
replaces double quotes in search words by a space.

Test plan :
- Set QueryAutoTruncate off (you may also need to set QueryFuzzy to off)
- Set QueryWeightFields off
- Perform a serch on two words where you have results, like : centre "ville
=> you get results
- Set QueryWeightFields on
- Perform same serch
=> you get the same results

Signed-off-by: Leila <koha.aixmarseille@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 868855df4b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>

C4/Search.pm

@@ -847,6 +847,7 @@ sub _build_weighted_query {
     my $stemming      = C4::Context->preference("QueryStemming")     || 0;
     my $weight_fields = C4::Context->preference("QueryWeightFields") || 0;
     my $fuzzy_enabled = C4::Context->preference("QueryFuzzy")        || 0;
+    $operand =~ s/"/ /g;    # Bug 7518: searches with quotation marks don't work
 
     my $weighted_query .= "(rk=(";    # Specifies that we're applying rank