Use consistant capitalization for "user agent"

Also checks in a little script that helps in doing this
semi-automatically.

Author: frivoal

bin/ua-capitalization.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# This script automates a large part of making sure "user agent" is written in lower case.
+# Doing so is backed by the CSS-WG resolution recorded at https://logs.csswg.org/irc.w3.org/css/2021-04-08/#e1402191
+# After this script has run,
+# there can remain a few instances of the term being used.
+# Those will have to be fixed manually.
+# Run frequently to avoid cruft piling up.
+for FILE in "$@"
+do
+	sed -i -e "s/\([a-zA-Z,;]\) User Agent/\1 user agent/"\
+	    -e "s/Note: User Agent/Note: User agent/"\
+	    -e "s/\. User Agent/. User agent/" $FILE
+done
+echo "Remaining instances of 'User Agent':"
+grep -R "User Agent" $@

css-2017/Overview.bs

@@ -431,7 +431,7 @@ CSS Profiles</h3>
 
 	In the past, the Working Group published a few Profiles,
 	which were meant to define the minimal subset of CSS
-	that various classes of User Agents were expected to support.
+	that various classes of user agents were expected to support.
 
 	This effort has been discontinued,
 	as the Working Group was not finding it effective or useful,

css-2018/Overview.bs

@@ -459,7 +459,7 @@ CSS Profiles</h3>
 
 	In the past, the Working Group published a few Profiles,
 	which were meant to define the minimal subset of CSS
-	that various classes of User Agents were expected to support.
+	that various classes of user agents were expected to support.
 
 	This effort has been discontinued,
 	as the Working Group was not finding it effective or useful,

css-2020/Overview.bs

@@ -525,7 +525,7 @@ CSS Profiles</h3>
 
 	In the past, the Working Group published a few Profiles,
 	which were meant to define the minimal subset of CSS
-	that various classes of User Agents were expected to support.
+	that various classes of user agents were expected to support.
 
 	This effort has been discontinued,
 	as the Working Group was not finding it effective or useful,

css-backgrounds-3/Overview.bs

@@ -2972,7 +2972,7 @@ module.
 
 <dl>
 <dt><dfn>UA</dfn>
-<dt><dfn id="user-agent">User Agent</dfn>
+<dt><dfn id="user-agent">user agent</dfn>
 <dd>
 <p>A program that reads and/or writes CSS style sheets on behalf of a
 user in either or both of these categories: programs whose purpose is

css-break-3/Overview.bs

@@ -273,7 +273,7 @@ Breaks Between Boxes: the 'break-before' and 'break-after' properties</h3>
 
   <p>
     Values for 'break-before' and 'break-after' are defined in the sub-sections below.
-    User Agents must apply these properties to boxes in the normal flow of the <a>fragmentation root</a>.
+    User agents must apply these properties to boxes in the normal flow of the <a>fragmentation root</a>.
     User agents should also apply these properties to floated boxes
     whose containing block is in the normal flow of the root fragmented element.
     User agents may also apply these properties to other boxes.

css-break-4/Overview.bs

@@ -265,7 +265,7 @@ Breaks Between Boxes: the 'break-before' and 'break-after' properties</h3>
 	indicate that content should be kept together.
 
 	Values for 'break-before' and 'break-after' are defined in the sub-sections below.
-	User Agents must apply these properties to boxes in the normal flow of the <a>fragmentation root</a>.
+	User agents must apply these properties to boxes in the normal flow of the <a>fragmentation root</a>.
 	User agents should also apply these properties to floated boxes
 	whose containing block is in the normal flow of the root fragmented element.
 	User agents may also apply these properties to other boxes.

css-contain-1/Overview.bs

@@ -50,7 +50,7 @@ spec:css-sizing-3; type:value; for:width; text:max-content
 <h2 id='intro'>
 Introduction</h2>
 
-	Efficiently rendering a website relies on the User Agent being able to detect what parts of the page are being displayed,
+	Efficiently rendering a website relies on the user agent being able to detect what parts of the page are being displayed,
 	which parts might affect the currently-displayed section,
 	and what can be ignored.
 
@@ -126,7 +126,7 @@ Strong Containment: the 'contain' property</h2>
 	contain-flexbox-outline.html
 	</wpt>
 
-	<p class=all-media>User Agents are expected to support this property on all media, including non-visual ones.</p>
+	<p class=all-media>User agents are expected to support this property on all media, including non-visual ones.</p>
 
 	The 'contain' property allows an author to indicate that an element and its contents are,
 	as much as possible,

css-contain-2/Overview.bs

@@ -57,7 +57,7 @@ spec:css-sizing-3; type:value; for:width; text:max-content
 <h2 id='intro'>
 Introduction</h2>
 
-	Efficiently rendering a website relies on the User Agent being able to detect what parts of the page are being displayed,
+	Efficiently rendering a website relies on the user agent being able to detect what parts of the page are being displayed,
 	which parts might affect the currently-displayed section,
 	and what can be ignored.
 
@@ -125,7 +125,7 @@ Strong Containment: the 'contain' property</h2>
 	contain-flexbox-outline.html
 	</wpt>
 
-	<p class=all-media>User Agents are expected to support this property on all media, including non-visual ones.</p>
+	<p class=all-media>User agents are expected to support this property on all media, including non-visual ones.</p>
 
 	The 'contain' property allows an author to indicate that an element and its contents are,
 	as much as possible,

css-content-3/Overview.bs

@@ -107,7 +107,7 @@ Inserting and replacing content with the 'content' property</h2>
 		Animation type: discrete
 	</pre>
 
-	<p class=all-media>User Agents are expected to support this property on all media, including non-visual ones.</p>
+	<p class=all-media>User agents are expected to support this property on all media, including non-visual ones.</p>
 
 	The 'content' property dictates what is rendered inside an element or pseudo-element.
 
@@ -395,7 +395,7 @@ Specifying quotes with the 'quotes' property</h4>
 		Animation type: discrete
 	</pre>
 
-	<p class=all-media>User Agents are expected to support this property on all media, including non-visual ones.</p>
+	<p class=all-media>User agents are expected to support this property on all media, including non-visual ones.</p>
 
 	This property specifies quotation marks for any number of embedded quotations. Values have the following meanings:
 
@@ -965,7 +965,7 @@ The string-set property</h4>
 	Animation type: discrete
 	</pre>
 
-	<p class=all-media>User Agents are expected to support this property on all media, including non-visual ones.</p>
+	<p class=all-media>User agents are expected to support this property on all media, including non-visual ones.</p>
 
 	The 'string-set' property copies the text content of an element into a ''named string'',
 	which functions as a variable.