fix wording of error message for unsupported switches

src/shared/commandlineparserbase.cc

@@ -135,7 +135,7 @@ void CommandLineParserBase::parseArg(int sections, const int argc, const char **
 		}
 #ifndef __EXTENSIVE_WKHTMLTOPDF_QT_HACK__
 		if (j.value()->qthack)
-			fprintf(stderr, "The switch %s, is not support using unpatched qt, and will be ignored.", argv[arg]);
+			fprintf(stderr, "The switch %s is not supported when using unpatched qt and will be ignored.", argv[arg]);
 #endif
 		//Skip already handled switch arguments
 		arg += j.value()->argn.size();
@@ -168,7 +168,7 @@ void CommandLineParserBase::parseArg(int sections, const int argc, const char **
 			}
 #ifndef __EXTENSIVE_WKHTMLTOPDF_QT_HACK__
  			if (k.value()->qthack)
- 				fprintf(stderr, "The switch -%c, is not support using unpatched qt, and will be ignored.", argv[c][j]);
+				fprintf(stderr, "The switch -%c is not supported when using unpatched qt and will be ignored.", argv[c][j]);
 #endif
 			//Skip already handled switch arguments
 			arg += k.value()->argn.size();