From a87088e58046504a4dc9546cd4693e1d4ccb744c Mon Sep 17 00:00:00 2001
From: Ekaterina Tuzova <Ekaterina.Tuzova@jetbrains.com>
Date: Wed, 18 May 2011 15:23:53 +0400
Subject: [PATCH] fixed PY-3511 False positive "Unresolved reference" on :param
 RST tag with underscores in

---
 .../python/documentation/DocStringReferenceProvider.java     | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/src/com/jetbrains/python/documentation/DocStringReferenceProvider.java b/python/src/com/jetbrains/python/documentation/DocStringReferenceProvider.java
index 27dd52435055..6bf45cc8f300 100644
--- a/python/src/com/jetbrains/python/documentation/DocStringReferenceProvider.java
+++ b/python/src/com/jetbrains/python/documentation/DocStringReferenceProvider.java
@@ -46,7 +46,10 @@ public class DocStringReferenceProvider extends PsiReferenceProvider {
           break;
         }
         pos = CharMatcher.anyOf(" \t*").negate().indexIn(docString, tagRange.getEndOffset());
-        int endPos = CharMatcher.JAVA_LETTER_OR_DIGIT.negate().indexIn(docString, pos);
+        int endPos = new CharMatcher() {
+                            @Override public boolean matches(char c) {
+                              return Character.isLetterOrDigit(c) || c == '_';
+                            }}.negate().indexIn(docString, pos);
         if (endPos < 0) {
           endPos = docString.length();
         }