Fix #13012: Duplicated misra warnings from misra.py and premiumaddon are not filtered properly in windows (#6703)

Author: swasti16

lib/settings.cpp

@@ -669,6 +669,8 @@ void Settings::setMisraRuleTexts(const std::string& data)
         std::string text = line.substr(pos + 1);
         if (id.empty() || text.empty())
             continue;
+        if (text[text.size() -1] == '\r')
+            text.erase(text.size() -1);
         mMisraRuleTexts[id] = std::move(text);
     }
 }

test/testsettings.cpp

@@ -263,9 +263,10 @@ class TestSettings : public TestFixture {
     void ruleTexts() const
     {
         Settings s;
-        s.setMisraRuleTexts("1.1 text 1\n1.2 text 2\n");
+        s.setMisraRuleTexts("1.1 text 1\n1.2 text 2\n1.3 text 3\r\n");
         ASSERT_EQUALS("text 1", s.getMisraRuleText("misra-c2012-1.1", "---"));
         ASSERT_EQUALS("text 2", s.getMisraRuleText("misra-c2012-1.2", "---"));
+        ASSERT_EQUALS("text 3", s.getMisraRuleText("misra-c2012-1.3", "---"));
     }
 
     void checkLevelDefault() const