[editorial][css-text-4] Move paragraphs between the intro of two sections

The first two paragraph of the intro to #line-breaking become the
introduction for #text-wrapping

Author: frivoal

css-text-4/Overview.bs

@@ -4101,8 +4101,37 @@ Tab Character Size: the 'tab-size' property</h3>
 <h2 id="text-wrapping">
 Text Wrapping</h2>
 
+	<wpt title="
+		Tests mostly not needed for this section:
+		these are definitions,
+		they get tested through their application,
+		not by themselves."></wpt>
+
+	When inline-level content is laid out into lines, it is broken across line boxes.
+	Such a break is called a <dfn export>line break</dfn>.
+	When a line is broken due to explicit line-breaking controls
+	(such as a <a>preserved</a> newline character),
+	or due to the start or end of a block,
+	it is a <dfn export>forced line break</dfn>.
+	When a line is broken due to content <dfn lt="wrapping|wrap">wrapping</dfn>
+	(i.e. when the UA creates unforced line breaks
+	in order to fit the content within the measure),
+	it is a <dfn>soft wrap break</dfn>.
+	The process of breaking inline-level content into lines is called <dfn export lt="line breaking process | line breaking">line breaking</dfn>.
+
+	Wrapping is only performed at an allowed break point,
+	called a <dfn export>soft wrap opportunity</dfn>.
+	When wrapping is enabled (see 'white-space'),
+	the UA must minimize the amount of content overflowing a line
+	by wrapping the line at a [=soft wrap opportunity=],
+	if one exists.
+
+	<wpt>
+	line-breaking/line-breaking-020.html
+	</wpt>
+
 	Where text is allowed to wrap is controlled
-	by the [[#line-breaking|line-breaking rules and controls]] above;
+	by the [[#line-breaking|line-breaking rules and controls]];
 	<em>whether</em> it is allowed to wrap
 	and how multiple [=soft wrap opportunities=] within a line are prioritized
 	is controlled
@@ -4111,7 +4140,7 @@ Text Wrapping</h2>
 	'wrap-before',
 	'wrap-after',
 	and
-	'wrap-inside' properties:
+	'wrap-inside' properties.
 
 <h3 id="text-wrap">
 Text Wrap Setting</h3>
@@ -5841,42 +5870,23 @@ Line Breaking Details</h3>
 Line Breaking and Word Boundaries</h2>
 
 	<wpt title="
-		Tests mostly not needed for this section:
-		these are definitions,
-		they get tested through their application,
-		not by themselves.
-
-		Can be a good section
+		This section deals in generalities
+		rather than specific requirements.
+		Exhaustive coverage is neither practical
+		nor needed,
+		as more specific requirements
+		are made in different sections,
+		and can be tested there.
+
+		Nonetheless,
+		this can be a good section
 		to host tests for i18n requirements
 		not covered in detail by the spec.
 
 		Possible additions:
 		* tests for at least one language with line breaking based on orthographic syllable boundaries
 		* Basic line breaking tests for some languages mentioned: Javanese, Balinese, Yi"></wpt>
 
-	When inline-level content is laid out into lines, it is broken across line boxes.
-	Such a break is called a <dfn export>line break</dfn>.
-	When a line is broken due to explicit line-breaking controls
-	(such as a <a>preserved</a> newline character),
-	or due to the start or end of a block,
-	it is a <dfn export>forced line break</dfn>.
-	When a line is broken due to content <dfn lt="wrapping|wrap">wrapping</dfn>
-	(i.e. when the UA creates unforced line breaks
-	in order to fit the content within the measure),
-	it is a <dfn>soft wrap break</dfn>.
-	The process of breaking inline-level content into lines is called <dfn export lt="line breaking process | line breaking">line breaking</dfn>.
-
-	Wrapping is only performed at an allowed break point,
-	called a <dfn export>soft wrap opportunity</dfn>.
-	When wrapping is enabled (see 'white-space'),
-	the UA must minimize the amount of content overflowing a line
-	by wrapping the line at a [=soft wrap opportunity=],
-	if one exists.
-
-	<wpt>
-	line-breaking/line-breaking-020.html
-	</wpt>
-
 	In most writing systems,
 	in the absence of hyphenation a [=soft wrap opportunity=] occurs only at word boundaries.
 	Many such systems use [=spaces=] or punctuation to explicitly separate words,