finished all inline text semantics tags

src/Html5/InlineTextSemantics/BrTag.php

@@ -5,7 +5,9 @@ namespace ByJoby\HTML\Html5\InlineTextSemantics;
 use ByJoby\HTML\Tags\AbstractTag;
 
 /**
- * The <br> HTML element produces a line break in text (carriage-return). It is useful for writing a poem or an address, where the division of lines is significant.
+ * The <br> HTML element produces a line break in text (carriage-return). It is
+ * useful for writing a poem or an address, where the division of lines is
+ * significant.
  *
  * Tag description by Mozilla Contributors licensed under CC-BY-SA 2.5
  * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/br

src/Html5/InlineTextSemantics/UTag.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace ByJoby\HTML\Html5\InlineTextSemantics;
+
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+/**
+ * The <u> HTML element represents a span of inline text which should be
+ * rendered in a way that indicates that it has a non-textual annotation. This
+ * is rendered by default as a simple solid underline, but may be altered using
+ * CSS.
+ *
+ * Valid use cases for the <u> element include annotating spelling errors,
+ * applying a proper name mark to denote proper names in Chinese text, and other
+ * forms of annotation.
+ *
+ * You should not use <u> to underline text for presentation purposes, or to
+ * denote titles of books.
+ *
+ * In most cases, you should use an element other than <u>, such as:
+ *
+ *  * <em> to denote stress emphasis
+ *  * <b> to draw attention to text
+ *  * <mark> to mark key words or phrases
+ *  * <strong> to indicate that text has strong importance
+ *  * <cite> to mark the titles of books or other publications
+ *  * <i> to denote technical terms, transliterations, thoughts, or names of
+ *    vessels in Western texts
+ *
+ * Tag description by Mozilla Contributors licensed under CC-BY-SA 2.5
+ * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/u
+ */
+class UTag extends AbstractContainerTag
+{
+    const TAG = 'u';
+}

src/Html5/InlineTextSemantics/VarTag.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace ByJoby\HTML\Html5\InlineTextSemantics;
+
+use ByJoby\HTML\Tags\AbstractContainerTag;
+
+/**
+ * The <var> HTML element represents the name of a variable in a mathematical
+ * expression or a programming context. It's typically presented using an
+ * italicized version of the current typeface, although that behavior is
+ * browser-dependent.
+ *
+ * Here's a simple example, using <var> to denote variable names in a
+ * mathematical equation.
+ *
+ * ```
+ * <p>A simple equation: <var>x</var> = <var>y</var> + 2</p>
+ * ```
+ *
+ * Tag description by Mozilla Contributors licensed under CC-BY-SA 2.5
+ * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/u
+ */
+class VarTag extends AbstractContainerTag
+{
+    const TAG = 'var';
+}

src/Html5/InlineTextSemantics/WbrTag.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace ByJoby\HTML\Html5\InlineTextSemantics;
+
+use ByJoby\HTML\Tags\AbstractTag;
+
+/**
+ * The <wbr> HTML element represents a word break opportunity—a position within
+ * text where the browser may optionally break a line, though its line-breaking
+ * rules would not otherwise create a break at that location.
+ *
+ * Tag description by Mozilla Contributors licensed under CC-BY-SA 2.5
+ * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/wbr
+ */
+class WbrTag extends AbstractTag
+{
+    // TODO figure out a way to make tags like this prefer having no whitespace added around them
+    const TAG = 'wbr';
+}