clang-tidy: apply misc-redundant-expression fixes

Source/CTest/cmCTestRunTest.cxx

@@ -119,10 +119,9 @@ void cmCTestRunTest::CompressOutput()
   strm.next_out = out;
   ret = deflate(&strm, Z_FINISH);
 
-  if (ret == Z_STREAM_ERROR || ret != Z_STREAM_END) {
+  if (ret != Z_STREAM_END) {
     cmCTestLog(this->CTest, ERROR_MESSAGE,
-               "Error during output "
-               "compression. Sending uncompressed output."
+               "Error during output compression. Sending uncompressed output."
                  << std::endl);
     delete[] out;
     return;

Source/cmCTest.cxx

@@ -2787,7 +2787,7 @@ bool cmCTest::CompressString(std::string& str)
   strm.next_out = &out[0];
   ret = deflate(&strm, Z_FINISH);
 
-  if (ret == Z_STREAM_ERROR || ret != Z_STREAM_END) {
+  if (ret != Z_STREAM_END) {
     cmCTestLog(this, ERROR_MESSAGE, "Error during gzip compression."
                  << std::endl);
     return false;

Source/cmDocumentationFormatter.cxx

@@ -156,7 +156,7 @@ void cmDocumentationFormatter::PrintColumn(std::ostream& os, const char* text)
 
     // Move to beginning of next word.  Skip over whitespace.
     l = r;
-    while (*l && (*l == ' ')) {
+    while (*l == ' ') {
       ++l;
     }
   }