Fix PY-8938 PEP 8: line too long quick fix doesn't exist (at least for strings)

Use "Fill Paragraph" action instead of "Reformat File" for too long lines

python/src/com/jetbrains/python/inspections/quickfix/PyFillParagraphFix.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.jetbrains.python.inspections.quickfix;
+
+import com.intellij.codeInsight.editorActions.fillParagraph.FillParagraphAction;
+import com.intellij.codeInsight.intention.HighPriorityAction;
+import com.intellij.codeInsight.intention.impl.BaseIntentionAction;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.PsiFile;
+import com.intellij.util.IncorrectOperationException;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.NotNull;
+
+public class PyFillParagraphFix extends BaseIntentionAction implements  HighPriorityAction {
+
+  public PyFillParagraphFix() {
+    setText("Fill paragraph");
+  }
+
+  @Nls
+  @NotNull
+  @Override
+  public String getFamilyName() {
+    return getText();
+  }
+
+  @Override
+  public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
+    return true;
+  }
+
+  @Override
+  public void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException {
+    final FillParagraphAction action = new FillParagraphAction();
+    action.actionPerformedImpl(project, editor);
+  }
+}

python/src/com/jetbrains/python/validation/Pep8ExternalAnnotator.java

@@ -56,6 +56,7 @@ import com.jetbrains.python.PythonLanguage;
 import com.jetbrains.python.codeInsight.imports.OptimizeImportsQuickFix;
 import com.jetbrains.python.formatter.PyCodeStyleSettings;
 import com.jetbrains.python.inspections.PyPep8Inspection;
+import com.jetbrains.python.inspections.quickfix.PyFillParagraphFix;
 import com.jetbrains.python.inspections.quickfix.ReformatFix;
 import com.jetbrains.python.inspections.quickfix.RemoveTrailingBlankLinesFix;
 import com.jetbrains.python.psi.*;
@@ -317,6 +318,9 @@ public class Pep8ExternalAnnotator extends ExternalAnnotator<Pep8ExternalAnnotat
         else if (problem.myCode.equals("W391")) {
           annotation.registerUniversalFix(new RemoveTrailingBlankLinesFix(), null, null);
         }
+        else if (problem.myCode.equals("E501")) {
+          annotation.registerFix(new PyFillParagraphFix());
+        }
         else {
           annotation.registerUniversalFix(new ReformatFix(), null, null);
         }