minor typo fixed

Author: howcom

css3-gcpm/Overview.src.html

@@ -3277,11 +3277,11 @@ <h3>Aligning baselines</h3>
 <p>In multi-column layouts, baselines are typically aligned between
 adjacent columns. This gives the presentation a visual rythm, and text
 in the end of the columns will be alignend. To support this, a new
-value on the <span class=property>'line-box-contain'</span> is
+value on the <span class=property>'line-box-contain'</span> property is
 defined: ''gap'' (or, perhaps, ''crack'', ''snap'', ''snap-gap'', ''void'', ''grid'', ''snap-to-grid'').
 
 <p>The value means that the height of the line in which the element
-occurs should be rounded upt to the smallest multiple of the used
+occurs should be rounded up to the smallest multiple of the used
 'line-height' value on the containing block.
 
 <div class=example>