Tidied up the expensive operation message

Signed-off-by: PiotrAniola82 <[email protected]>

src/javacore_analyser/templates/index.html

@@ -23,7 +23,7 @@ <h2>Generate report:</h2>
       <br><input type="submit" value="Run"></br>
       <p></p>
       <strong>
-        NOTE: The report generation is expensive operation and might take even few minutes. Please be patient
+        NOTE: Report generation is an expensive operation. It may take a few minutes. Please be patient.
       </strong>
 
     </form>