QuickDoc: Show sample code containing type parameters correctly

#KT-20777 Fixed

idea/testData/kdoc/multiModuleSamples/typeParameters/code/usageNestedTypeParameters.kt

@@ -0,0 +1,11 @@
+/**
+ * @sample samples.nestedTypeParameter
+ */
+fun some<caret>() {
+
+}
+
+//INFO: <div class='definition'><pre><font color="808080"><i>usageNestedTypeParameters.kt</i></font><br>public fun <b>some</b>(): Unit</pre></div><div class='content'></div><table class='sections'><tr><td valign='top' class='section'><p>Samples:</td><td valign='top'><p><a href="psi_element://samples.nestedTypeParameter"><code>samples.nestedTypeParameter</code></a><pre><code>
+//INFO: val m = mapOf&lt;String, Pair&lt;Int, Long&gt;&gt;()
+//INFO: println(m)
+//INFO: </code></pre></td></table>

idea/testData/kdoc/multiModuleSamples/typeParameters/code/usageSingleTypeParameter.kt

@@ -0,0 +1,11 @@
+/**
+ * @sample samples.singleTypeParameter
+ */
+fun some<caret>() {
+
+}
+
+//INFO: <div class='definition'><pre><font color="808080"><i>usageSingleTypeParameter.kt</i></font><br>public fun <b>some</b>(): Unit</pre></div><div class='content'></div><table class='sections'><tr><td valign='top' class='section'><p>Samples:</td><td valign='top'><p><a href="psi_element://samples.singleTypeParameter"><code>samples.singleTypeParameter</code></a><pre><code>
+//INFO: val l = listOf&lt;String&gt;()
+//INFO: println(l)
+//INFO: </code></pre></td></table>

idea/testData/kdoc/multiModuleSamples/typeParameters/samplesTest/nested.kt

@@ -0,0 +1,6 @@
+package samples
+
+fun nestedTypeParameter() {
+    val m = mapOf<String, Pair<Int, Long>>()
+    println(m)
+}

idea/testData/kdoc/multiModuleSamples/typeParameters/samplesTest/single.kt

@@ -0,0 +1,6 @@
+package samples
+
+fun singleTypeParameter() {
+    val l = listOf<String>()
+    println(l)
+}