Fixup various spelling errors (#1208)

include/internal/catch_capture_matchers.cpp

@@ -13,7 +13,7 @@ namespace Catch {
     using StringMatcher = Matchers::Impl::MatcherBase<std::string>;
 
     // This is the general overload that takes a any string matcher
-    // There is another overload, in catch_assertinhandler.h/.cpp, that only takes a string and infers
+    // There is another overload, in catch_assertionhandler.h/.cpp, that only takes a string and infers
     // the Equals matcher (so the header does not mention matchers)
     void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef matcherString  ) {
         std::string exceptionMessage = Catch::translateActiveException();

include/internal/catch_session.cpp

@@ -133,7 +133,7 @@ namespace Catch {
         if ( !exceptions.empty() ) {
             m_startupExceptions = true;
             Colour colourGuard( Colour::Red );
-            Catch::cerr() << "Errors occured during startup!" << '\n';
+            Catch::cerr() << "Errors occurred during startup!" << '\n';
             // iterate over all exceptions and notify user
             for ( const auto& ex_ptr : exceptions ) {
                 try {

include/reporters/catch_reporter_tap.hpp

@@ -26,7 +26,7 @@ namespace Catch {
         ~TAPReporter() override;
 
         static std::string getDescription() {
-            return "Reports test results in TAP format, suitable for test harneses";
+            return "Reports test results in TAP format, suitable for test harnesses";
         }
 
         ReporterPreferences getPreferences() const override {