[css-ruby] Very mild wording tweaks.

Author: fantasai

css-ruby/Overview.html

@@ -477,7 +477,7 @@ <h3 class="heading settled heading" data-level=2.2 id=box-fixup><span class=secn
 			directly parented by a <a data-link-type=dfn href=#ruby-annotation-container-box title="ruby annotation container">ruby annotation container</a>
 			is wrapped in an anonymous <a data-link-type=dfn href=#ruby-annotation-box title="ruby annotation">ruby annotation</a>.
 
-<p>However, if the anonymous box so constructed contains only <i data-link-type=dfn title="white space">white space</i>,
+<p>However, if an anonymous box so constructed contains only <i data-link-type=dfn title="white space">white space</i>,
 			it is considered <dfn data-dfn-type=dfn data-noexport="" id=intra-ruby-white-space>intra-ruby white space<a class=self-link href=#intra-ruby-white-space></a></dfn>
 			and is either discarded as <a data-link-type=dfn href=#inter-level-white-space title="inter-level white space">inter-level white space</a>
 			or preserved as <a data-link-type=dfn href=#intra-level-white-space title="intra-level white space">intra-level white space</a>
@@ -501,7 +501,7 @@ <h3 class="heading settled heading" data-level=2.2 id=box-fixup><span class=secn
 			</table>
 
 		<li id=anon-gen-interpret-space><a class=self-link href=#anon-gen-interpret-space></a><strong>Interpret intra-level white space:</strong>
-			Any <a data-link-type=dfn href=#intra-ruby-white-space title="intra-ruby white space">intra-ruby white space</a>
+			Any <a data-link-type=dfn href=#intra-ruby-white-space title="intra-ruby white space">intra-ruby white space</a> box
 			whose immediately adjacent siblings match one of the patterns below
 			is assigned the box type and subtype defined in the table below:
 			<table class=data>

css-ruby/Overview.src.html

@@ -323,7 +323,7 @@ <h3 id="box-fixup">
 			directly parented by a <i>ruby annotation container</i>
 			is wrapped in an anonymous <i>ruby annotation</i>.
 
-			However, if the anonymous box so constructed contains only <i>white space</i>,
+			However, if an anonymous box so constructed contains only <i>white space</i>,
 			it is considered <dfn>intra-ruby white space</dfn>
 			and is either discarded as <i>inter-level white space</i>
 			or preserved as <i>intra-level white space</i>
@@ -356,7 +356,7 @@ <h3 id="box-fixup">
 			</table>
 
 		<li id="anon-gen-interpret-space"><strong>Interpret intra-level white space:</strong>
-			Any <i>intra-ruby white space</i>
+			Any <i>intra-ruby white space</i> box
 			whose immediately adjacent siblings match one of the patterns below
 			is assigned the box type and subtype defined in the table below:
 			<table class="data">