Core: rnotwhite -> rhtmlnotwhite and jQuery.trim -> stripAndCollapse

- Renames and changes rnotwhite to focus on HTML whitespace chars
- Change internal use of jQuery.trim to more accurate strip and collapse
- Adds tests to ensure HTML space characters are retained where valid
- Doesn't add tests where the difference is inconsequential and
  existing tests are adequate.

Fixes gh-3003
Fixes gh-3072
Close gh-3316

2 files changed, 8 insertions, 5 deletions

diff --git a/src/var/rnothtmlwhite.js b/src/var/rnothtmlwhite.js
new file mode 100644
index 000000000..30604db4f
--- /dev/null
+++ b/src/var/rnothtmlwhite.js
@@ -0,0 +1,8 @@
+define( function() {
+	"use strict";
+
+	// Only count HTML whitespace
+	// Other whitespace should count in values
+	// https://html.spec.whatwg.org/multipage/infrastructure.html#space-character
+	return ( /[^\x20\t\r\n\f]+/g );
+} );
diff --git a/src/var/rnotwhite.js b/src/var/rnotwhite.js
deleted file mode 100644
index 91bdec22f..000000000
--- a/src/var/rnotwhite.js
+++ /dev/null
@@ -1,5 +0,0 @@
-define( function() {
-	"use strict";
-
-	return ( /\S+/g );
-} );