kernel-shark-qt: Correct the "help" message of the plot example

Cosmetic corrections.

Signed-off-by: Yordan Karadzhov <ykaradzhov@vmware.com>
diff --git a/kernel-shark/examples/dataplot.cpp b/kernel-shark/examples/dataplot.cpp
index 1b32a4c..c539e4e 100644
--- a/kernel-shark/examples/dataplot.cpp
+++ b/kernel-shark/examples/dataplot.cpp
@@ -34,12 +34,12 @@
 void usage(const char *prog)
 {
 	cout << "Usage: " << prog << endl;
-	cout << "  -h	Display this help message\n";
+	cout << "  -h	Display this help message.\n";
 	cout << "  -s	Draw shapes. This demonstrates how to draw simple "
 	     << "geom. shapes.\n";
 	cout << "  -i	<file>	Input file and draw animated graphs.\n";
 	cout << "  No args.	Import " << default_file
-	     << "and draw animated graphs.\n";
+	     << " and draw animated graphs.\n";
 }
 
 /* An example function drawing something. */