Fixed #5261, break at the end of a label caused wrong bounding box.

js/highcharts.src.js

@@ -3529,10 +3529,10 @@
                 }
 
 
-                // remove empty line at end
-                if (lines[lines.length - 1] === '') {
-                    lines.pop();
-                }
+                // Trim empty lines (#5261)
+                lines = grep(lines, function (line) {
+                    return line !== '';
+                });
 
 
                 // build the lines

js/highmaps.src.js

@@ -3527,10 +3527,10 @@
                 }
 
 
-                // remove empty line at end
-                if (lines[lines.length - 1] === '') {
-                    lines.pop();
-                }
+                // Trim empty lines (#5261)
+                lines = grep(lines, function (line) {
+                    return line !== '';
+                });
 
 
                 // build the lines

js/highstock.src.js

@@ -3529,10 +3529,10 @@
                 }
 
 
-                // remove empty line at end
-                if (lines[lines.length - 1] === '') {
-                    lines.pop();
-                }
+                // Trim empty lines (#5261)
+                lines = grep(lines, function (line) {
+                    return line !== '';
+                });
 
 
                 // build the lines

js/parts/SvgRenderer.js

@@ -1459,10 +1459,10 @@ SVGRenderer.prototype = {
 			}
 
 
-			// remove empty line at end
-			if (lines[lines.length - 1] === '') {
-				lines.pop();
-			}
+			// Trim empty lines (#5261)
+			lines = grep(lines, function (line) {
+				return line !== '';
+			});
 
 
 			// build the lines

samples/issues/highcharts-4.2.4/5261-label-trim-lines/demo.details

@@ -0,0 +1,5 @@
+---
+ resources:
+   - https://code.jquery.com/qunit/qunit-1.19.0.js
+   - https://code.jquery.com/qunit/qunit-1.19.0.css
+...

samples/issues/highcharts-4.2.4/5261-label-trim-lines/demo.html

@@ -0,0 +1,9 @@
+<script src="https://code.highcharts.com/highcharts.js"></script>
+<script src="https://code.highcharts.com/modules/heatmap.js"></script>
+
+<div id="qunit"></div>
+<div id="qunit-fixture"></div>
+
+
+<div id="container" style="width: 1000px; margin: 0 auto;"></div>
+<div id="exported"></div>

samples/issues/highcharts-4.2.4/5261-label-trim-lines/demo.js

@@ -0,0 +1,48 @@
+jQuery(function () {
+
+    QUnit.test('Left trim', function (assert) {
+
+        var ren = new Highcharts.Renderer(
+            document.getElementById('container'),
+            500,
+            300
+        );
+
+        var correctLabel = ren.label('Hello World', 100, 25)
+            .attr({
+                'stroke-width': 1,
+                stroke: 'blue'
+            })
+            .add();
+
+
+        var label = ren.label('<br>Hello World', 100, 50)
+            .attr({
+                'stroke-width': 1,
+                stroke: 'blue'
+            })
+            .add();
+
+        // tspan.dy should be the same as the reference
+        assert.strictEqual(
+            label.element.querySelector('tspan').getAttribute('dy'),
+            correctLabel.element.querySelector('tspan').getAttribute('dy'),
+            'Tspan dy offset'
+        );
+
+
+        label = ren.label('Hello World<br>', 100, 50)
+            .attr({
+                'stroke-width': 1,
+                stroke: 'blue'
+            })
+            .add();
+
+        // tspan.dy should be the same as the reference
+        assert.strictEqual(
+            label.element.querySelector('tspan').getAttribute('dy'),
+            correctLabel.element.querySelector('tspan').getAttribute('dy'),
+            'Tspan dy offset'
+        );
+    });
+});