Fix escape spacing

* In test "\text{if}~n\ \text{is even} "

Bug: T315978
Change-Id: I839b7e912bc95abff1f589467c848fc8b2fb0fe6

Author: Hyper-Node

src/TexVC/MMLmappings/BaseMethods.php

@@ -127,7 +127,9 @@ public function parseOperatorDict( $node, $passedArgs, $operatorContent, $input,
 				$mmlMo = new MMLmo();
 				return $mmlMo->encapsulateRaw( ">" );
 			case "\\":
-				$mspace = new MMLmspace( "", [ "linebreak" => "newline" ] );
+				 // instead of carriage return, force whitespace here:
+				 // see: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Math/+/961213
+				$mspace = new MMLmspace( "", [ "width" => "0.5em" ] );
 				return $mspace->getEmpty();
 		}
 		return $input;

tests/phpunit/unit/TexVC/MMLRenderTest.php

@@ -230,10 +230,17 @@ public function testStyle4() {
 		$this->assertEquals( 2, $count );
 	}
 
-	public function testCrLaTex() {
+	public function testSpaceText() {
+		$input = "\\text{if}~n\ \\text{is even} ";
+		$mathMLtexVC = $this->generateMML( $input );
+		$this->assertStringContainsString( "<mspace", $mathMLtexVC );
+	}
+
+	public function testSpaceOther() {
+		// It is expected to render CR as whitespace
 		$input = "\,e_{x}=\sum _{t=1}^{\infty }\ _{t}p_{x}";
 		$mathMLtexVC = $this->generateMML( $input );
-		$this->assertStringContainsString( "<mspace linebreak=\"newline\"/>", $mathMLtexVC );
+		$this->assertStringContainsString( "<mspace", $mathMLtexVC );
 	}
 
 	public function testGenfracDQ() {