Change round tooltip to include even rounding info

appinventor/blocklyeditor/src/msg/en/_messages.js

@@ -438,13 +438,14 @@ Blockly.Msg.en.switch_language_to_english = {
     Blockly.Msg.LANG_MATH_SINGLE_HELPURL_EXP ='/reference/blocks/math.html#e';
     /*Blockly.Msg.LANG_MATH_SINGLE_TOOLTIP_POW10 = 'Return 10 to the power of a number.';*/
 
-    Blockly.Msg.LANG_MATH_ROUND_TOOLTIP_ROUND = 'Round a number up or down.';
+    Blockly.Msg.LANG_MATH_ROUND_TOOLTIP_ROUND = 'Rounds the input to the nearest integer. ' +
+        'Values with a fraction of .5 are rounded to the nearest even integer.';
     Blockly.Msg.LANG_MATH_ROUND_HELPURL_ROUND = '/reference/blocks/math.html#round';
     Blockly.Msg.LANG_MATH_ROUND_TOOLTIP_CEILING = 'Rounds the input to the smallest\n' +
-        'number not less then the input';
+        'number not less then the input.';
     Blockly.Msg.LANG_MATH_ROUND_HELPURL_CEILING =  '/reference/blocks/math.html#ceiling';
     Blockly.Msg.LANG_MATH_ROUND_TOOLTIP_FLOOR = 'Rounds the input to the largest\n' +
-        'number not greater then the input';
+        'number not greater then the input.';
     Blockly.Msg.LANG_MATH_ROUND_HELPURL_FLOOR =  '/reference/blocks/math.html#floor';
     Blockly.Msg.LANG_MATH_ROUND_OPERATOR_ROUND = 'round';
     Blockly.Msg.LANG_MATH_ROUND_OPERATOR_CEILING = 'ceiling';