Fix typos identified by codespell.

Self test baselines also modified accordingly, due to
one typo found in a string in test code.

include/internal/catch_matchers_generic.hpp

@@ -45,7 +45,7 @@ public:
 
     // The following functions create the actual matcher objects.
     // The user has to explicitly specify type to the function, because
-    // infering std::function<bool(T const&)> is hard (but possible) and
+    // inferring std::function<bool(T const&)> is hard (but possible) and
     // requires a lot of TMP.
     template<typename T>
     Generic::PredicateMatcher<T> Predicate(std::function<bool(T const&)> const& predicate, std::string const& description = "") {

include/internal/catch_output_redirect.cpp

@@ -71,7 +71,7 @@ namespace Catch {
             if (strerror_s(buffer, errno)) {
                 CATCH_RUNTIME_ERROR("Could not translate errno to a string");
             }
-            CATCH_RUNTIME_ERROR("Coul dnot open the temp file: '" << m_buffer << "' because: " << buffer);
+            CATCH_RUNTIME_ERROR("Could not open the temp file: '" << m_buffer << "' because: " << buffer);
         }
     }
 #else

include/internal/catch_test_case_info.cpp

@@ -43,7 +43,7 @@ namespace Catch {
         void enforceNotReservedTag( std::string const& tag, SourceLineInfo const& _lineInfo ) {
             CATCH_ENFORCE( !isReservedTag(tag),
                           "Tag name: [" << tag << "] is not allowed.\n"
-                          << "Tag names starting with non alpha-numeric characters are reserved\n"
+                          << "Tag names starting with non alphanumeric characters are reserved\n"
                           << _lineInfo );
         }
     }