From a5b12a4e83f99552bc113101e640220999cd921c Mon Sep 17 00:00:00 2001
From: Maikel Steneker <maikel.steneker@tiobe.com>
Date: Fri, 15 Jun 2018 11:22:59 +0200
Subject: [PATCH 1/3] Added test case for Python backticks.

---
 .../net/sourceforge/pmd/cpd/PythonTokenizerTest.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/pmd-python/src/test/java/net/sourceforge/pmd/cpd/PythonTokenizerTest.java b/pmd-python/src/test/java/net/sourceforge/pmd/cpd/PythonTokenizerTest.java
index 58d771f7eb..6896a14d62 100644
--- a/pmd-python/src/test/java/net/sourceforge/pmd/cpd/PythonTokenizerTest.java
+++ b/pmd-python/src/test/java/net/sourceforge/pmd/cpd/PythonTokenizerTest.java
@@ -53,4 +53,16 @@ public class PythonTokenizerTest extends AbstractTokenizerTest {
         TokenEntry.getEOF();
         assertEquals(3, tokens.size()); // 3 tokens: "import" + "logging" + EOF
     }
+
+    @Test
+    public void testBackticks() throws IOException {
+        SourceCode sourceCode = new SourceCode(new SourceCode.StringCodeLoader("test = 'hello'" + PMD.EOL
+                + "quoted = `test`" + PMD.EOL
+                + "print quoted" + PMD.EOL
+        ));
+        Tokens tokens = new Tokens();
+        tokenizer.tokenize(sourceCode, tokens); // should not result in parse error
+        TokenEntry.getEOF();
+        assertEquals(3, tokens.getTokens().get(tokens.getTokens().size() - 2).getBeginLine());
+    }
 }

From cad32d9b830b7b437cd299e87fbdd01658407326 Mon Sep 17 00:00:00 2001
From: Bram Stappers <bram.stappers@tiobe.com>
Date: Wed, 28 Jun 2017 15:28:25 +0200
Subject: [PATCH 2/3] 18984: [PMD] Added support for Python 2 backticks (`).

---
 pmd-python/etc/grammar/python.jj | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pmd-python/etc/grammar/python.jj b/pmd-python/etc/grammar/python.jj
index 60f723870c..1f97f9d948 100644
--- a/pmd-python/etc/grammar/python.jj
+++ b/pmd-python/etc/grammar/python.jj
@@ -52,6 +52,7 @@ TOKEN : /* SEPARATORS */
 |   < COMMA: "," >
 |   < DOT: "." >
 |   < COLON: ":" >
+|   < BACKTICK: "`" >
 }
 
 
@@ -280,4 +281,4 @@ MORE : /* Strings */
 |   <"\r"> { image.setCharAt(image.length()-1, '\n'); }
 |   <~["\n","\r"]>
 |   <"\\" ~["\n","\r"]>
-}
\ No newline at end of file
+}

From cd6be28f9bdea3e15b48c286b98afd8fa5c7184c Mon Sep 17 00:00:00 2001
From: Andreas Dangel <andreas.dangel@microdoc.com>
Date: Fri, 3 May 2019 12:27:47 +0200
Subject: [PATCH 3/3] Update release notes, refs #1802, fixes #1810

---
 docs/pages/release_notes.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/pages/release_notes.md b/docs/pages/release_notes.md
index edf8ae5b63..2ca9bdc86e 100644
--- a/docs/pages/release_notes.md
+++ b/docs/pages/release_notes.md
@@ -45,6 +45,8 @@ Being based on a proper Antlr grammar, CPD can:
     *   [#1782](https://github.com/pmd/pmd/issues/1782): \[java] NoPackage: False Negative for enums
 *   java-design
     *   [#1760](https://github.com/pmd/pmd/issues/1760): \[java] UseObjectForClearerAPI flags private methods
+*   python
+    *   [#1810](https://github.com/pmd/pmd/issues/1810): \[python] \[cpd] Parse error when using Python 2 backticks
 
 ### API Changes
 
@@ -56,6 +58,7 @@ Being based on a proper Antlr grammar, CPD can:
 *   [#1761](https://github.com/pmd/pmd/pull/1761): \[dart] \[cpd] Added CPD support for Dart - [Maikel Steneker](https://github.com/maikelsteneker)
 *   [#1776](https://github.com/pmd/pmd/pull/1776): \[java] Show more detailed message when can't resolve field type - [Andrey Fomin](https://github.com/andrey-fomin)
 *   [#1781](https://github.com/pmd/pmd/pull/1781): \[java] Location change in AssignmentToNonFinalStatic - [Maikel Steneker](https://github.com/maikelsteneker)
+*   [#1802](https://github.com/pmd/pmd/pull/1802): \[python] \[cpd] Add support for Python 2 backticks - [Maikel Steneker](https://github.com/maikelsteneker)
 
 {% endtocmaker %}