Translated a paragraph which is a part of the section.

  Issue elixir-lang-jp#40

Author: tsubasa.kat

_po/ja.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
-"PO-Revision-Date: 2019-05-28 06:00+0900\n"
+"PO-Revision-Date: 2019-05-29 08:00+0900\n"
 "Language: ja\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -10671,7 +10671,7 @@ msgid ""
 "In some cases, you don't care about a particular value in a pattern. It is a c"
 "ommon practice to bind those values to the underscore, `_`. For example, if on"
 "ly the head of the list matters to us, we can assign the tail to underscore:"
-msgstr ""
+msgstr "時にはパターンにおける値を気にしたくない場合があります。そういった場合は、`_` という変数へ値を代入するという慣習的な方法を使います。"
 
 msgid ""
 "In some cases, you may need to inject such *values* into *quoted expressions*."

_po/ja/getting-started/pattern-matching.po

@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
-"PO-Revision-Date: 2019-05-28 06:00+0900\n"
+"PO-Revision-Date: 2019-05-29 08:00+0900\n"
 "Language: ja\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -279,7 +279,7 @@ msgid ""
 "In some cases, you don't care about a particular value in a pattern. It is a c"
 "ommon practice to bind those values to the underscore, `_`. For example, if on"
 "ly the head of the list matters to us, we can assign the tail to underscore:"
-msgstr ""
+msgstr "時にはパターンにおける値を気にしたくない場合があります。そういった場合は、`_` という変数へ値を代入するという慣習的な方法を使います。"
 
 msgid ""
 "```iex\n"

docs/getting-started/pattern-matching.html

@@ -362,7 +362,7 @@ <h2 id="ピン演算子">ピン演算子</h2>
 ** (MatchError) no match of right hand side value: {1, 2}
 </code></pre>
 
-<p>In some cases, you don’t care about a particular value in a pattern. It is a common practice to bind those values to the underscore, <code class="highlighter-rouge">_</code>. For example, if only the head of the list matters to us, we can assign the tail to underscore:</p>
+<p>時にはパターンにおける値を気にしたくない場合があります。そういった場合は、<code class="highlighter-rouge">_</code> という変数へ値を代入するという慣習的な方法を使います。</p>
 
 <pre><code class="language-iex">iex&gt; [h | _] = [1, 2, 3]
 [1, 2, 3]

ja/getting-started/pattern-matching.markdown

@@ -159,7 +159,7 @@ iex> {x, x} = {1, 2}
 ** (MatchError) no match of right hand side value: {1, 2}
 ```
 
-In some cases, you don't care about a particular value in a pattern. It is a common practice to bind those values to the underscore, `_`. For example, if only the head of the list matters to us, we can assign the tail to underscore:
+時にはパターンにおける値を気にしたくない場合があります。そういった場合は、`_` という変数へ値を代入するという慣習的な方法を使います。
 
 ```iex
 iex> [h | _] = [1, 2, 3]