Update scanscalar.cpp

Removed damn.  happened to notice this through another project ( on a git submodule ) while skimming code to understand things. I use yaml-cpp on other projects and think it's great, so I thought I'd do my tiny little part. Totally fine if you think this is unnecessary or unwarranted.

src/scanscalar.cpp

@@ -73,7 +73,7 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
         continue;
       }
 
-      // otherwise, just add the damn character
+      // otherwise, add the character
       char ch = INPUT.get();
       scalar += ch;
       if (ch != ' ' && ch != '\t') {