Make sure to get completions for backticks in docstrings work, see #860

jedi/api/completion.py

@@ -447,6 +447,7 @@ class Completion:
 
         - Having an indented block of code
         - Having some doctest code that starts with `>>>`
+        - Having backticks that doesn't have whitespace inside it
         """
         def iter_relevant_lines(lines):
             include_next_line = False
@@ -460,11 +461,17 @@ class Completion:
 
         string = dedent(string)
         code_lines = split_lines(string, keepends=True)
-        code_lines = list(iter_relevant_lines(code_lines))
-        if code_lines[-1] is not None:
+        relevant_code_lines = list(iter_relevant_lines(code_lines))
+        if relevant_code_lines[-1] is not None:
             # Some code lines might be None, therefore get rid of that.
-            code_lines = [c or '\n' for c in code_lines]
+            relevant_code_lines = [c or '\n' for c in relevant_code_lines]
+            return self._complete_code_lines(relevant_code_lines)
+        match = re.search(r'`([^`\s]+)', code_lines[-1])
+        if match:
+            return self._complete_code_lines([match.group(1)])
+        return []
 
+    def _complete_code_lines(self, code_lines):
         module_node = self._inference_state.grammar.parse(''.join(code_lines))
         module_value = ModuleValue(
             self._inference_state,
@@ -482,7 +489,6 @@ class Completion:
             signatures_callback=lambda *args, **kwargs: [],
             fuzzy=self._fuzzy
         ).complete()
-        return []
 
 
 def _gather_nodes(stack):

test/completion/docstring.py

@@ -284,6 +284,25 @@ def doctest_with_space():
         import_issu
     """
 
+
+def docstring_rst_identifiers():
+    """
+    #? 30 ['import_issues']
+    hello I'm here `import_iss` blabla
+
+    #? ['import_issues']
+    hello I'm here `import_iss
+
+    #? []
+    hello I'm here import_iss
+    #? []
+    hello I'm here ` import_iss
+
+    #? ['upper']
+    hello I'm here `str.upp
+    """
+
+
 def doctest_without_ending():
     """
     #? []