makerst: Escape default values using reST markup

Otherwise the docs would complain about values like "godot_"
which reST tries to interpret as an identifier.

doc/tools/makerst.py

@@ -148,6 +148,8 @@ class State:
                 setter = property.get("setter") or None  # Use or None so '' gets turned into None.
                 getter = property.get("getter") or None
                 default_value = property.get("default") or None
+                if default_value is not None:
+                    default_value = escape_rst(default_value)
                 overridden = property.get("override") or False
 
                 property_def = PropertyDef(property_name, type_name, setter, getter, property.text, default_value, overridden)
@@ -622,6 +624,40 @@ def make_class_list(class_list, columns):  # type: (List[str], int) -> None
     f.close()
 
 
+def escape_rst(text, until_pos=-1):  # type: (str) -> str
+    # Escape \ character, otherwise it ends up as an escape character in rst
+    pos = 0
+    while True:
+        pos = text.find('\\', pos, until_pos)
+        if pos == -1:
+            break
+        text = text[:pos] + "\\\\" + text[pos + 1:]
+        pos += 2
+
+    # Escape * character to avoid interpreting it as emphasis
+    pos = 0
+    while True:
+        pos = text.find('*', pos, until_pos)
+        if pos == -1:
+            break
+        text = text[:pos] + "\*" + text[pos + 1:]
+        pos += 2
+
+    # Escape _ character at the end of a word to avoid interpreting it as an inline hyperlink
+    pos = 0
+    while True:
+        pos = text.find('_', pos, until_pos)
+        if pos == -1:
+            break
+        if not text[pos + 1].isalnum():  # don't escape within a snake_case word
+            text = text[:pos] + "\_" + text[pos + 1:]
+            pos += 2
+        else:
+            pos += 1
+
+    return text
+
+
 def rstize_text(text, state):  # type: (str, State) -> str
     # Linebreak + tabs in the XML should become two line breaks unless in a "codeblock"
     pos = 0
@@ -677,36 +713,7 @@ def rstize_text(text, state):  # type: (str, State) -> str
             pos += 2
 
     next_brac_pos = text.find('[')
-
-    # Escape \ character, otherwise it ends up as an escape character in rst
-    pos = 0
-    while True:
-        pos = text.find('\\', pos, next_brac_pos)
-        if pos == -1:
-            break
-        text = text[:pos] + "\\\\" + text[pos + 1:]
-        pos += 2
-
-    # Escape * character to avoid interpreting it as emphasis
-    pos = 0
-    while True:
-        pos = text.find('*', pos, next_brac_pos)
-        if pos == -1:
-            break
-        text = text[:pos] + "\*" + text[pos + 1:]
-        pos += 2
-
-    # Escape _ character at the end of a word to avoid interpreting it as an inline hyperlink
-    pos = 0
-    while True:
-        pos = text.find('_', pos, next_brac_pos)
-        if pos == -1:
-            break
-        if not text[pos + 1].isalnum():  # don't escape within a snake_case word
-            text = text[:pos] + "\_" + text[pos + 1:]
-            pos += 2
-        else:
-            pos += 1
+    text = escape_rst(text, next_brac_pos)
 
     # Handle [tags]
     inside_code = False