Indent bullet points in enum descriptions

When converting doc xml files to rst, add an indenation level to bullet points in the text description of enum values.
Also add check to avoid out of bounds error in rstize_text.

(cherry picked from commit 38cf07b768)

doc/tools/make_rst.py

@@ -592,7 +592,8 @@ def make_rst_class(class_def, state, dry_run, output_dir):  # type: (ClassDef, S
             for value in e.values.values():
                 f.write("- **{}** = **{}**".format(value.name, value.value))
                 if value.text is not None and value.text.strip() != "":
-                    f.write(" --- " + rstize_text(value.text.strip(), state))
+                    # If value.text contains a bullet point list, each entry needs additional indentation
+                    f.write(" --- " + indent_bullets(rstize_text(value.text.strip(), state)))
 
                 f.write("\n\n")
 
@@ -738,7 +739,7 @@ def rstize_text(text, state):  # type: (str, State) -> str
 
         pre_text = text[:pos]
         indent_level = 0
-        while text[pos + 1] == "\t":
+        while pos + 1 < len(text) and text[pos + 1] == "\t":
             pos += 1
             indent_level += 1
         post_text = text[pos + 1 :]
@@ -1190,5 +1191,24 @@ def make_link(url, title):  # type: (str, str) -> str
         return "`" + url + " <" + url + ">`__"
 
 
+def indent_bullets(text):  # type: (str) -> str
+    # Take the text and check each line for a bullet point represented by "-".
+    # Where found, indent the given line by a further "\t".
+    # Used to properly indent bullet points contained in the description for enum values.
+    # Ignore the first line - text will be prepended to it so bullet points wouldn't work anyway.
+    bullet_points = "-"
+
+    lines = text.splitlines(keepends=True)
+    for line_index, line in enumerate(lines[1:], start=1):
+        pos = 0
+        while pos < len(line) and line[pos] == "\t":
+            pos += 1
+
+        if pos < len(line) and line[pos] in bullet_points:
+            lines[line_index] = line[:pos] + "\t" + line[pos:]
+
+    return "".join(lines)
+
+
 if __name__ == "__main__":
     main()