Tag updates

bot/resources/tags/codeblock.md

@@ -1,6 +1,6 @@
 ---
 embed:
-    title: "Formatting code on discord"
+    title: "Formatting code on Discord"
 ---
 Here's how to format Python code on Discord:
 

bot/resources/tags/equals-true.md

@@ -0,0 +1,24 @@
+---
+embed:
+    title: "Comparisons to `True` and `False`"
+---
+It's tempting to think that if statements always need a comparison operator like `==` or `!=`, but this isn't true.
+If you're just checking if a value is truthy or falsey, you don't need `== True` or `== False`.
+```py
+# instead of this...
+if user_input.startswith('y') == True:
+    my_func(user_input)
+
+# ...write this
+if user_input.startswith('y'):
+    my_func(user_input)
+
+# for false conditions, instead of this...
+if user_input.startswith('y') == False:
+    my_func(user_input)
+
+# ...just use `not`
+if not user_input.startswith('y'):
+    my_func(user_input)
+```
+This also applies to expressions that use `is True` or `is False`.

bot/resources/tags/range-len.md

@@ -2,12 +2,12 @@
 embed:
     title: "Pythonic way of iterating over ordered collections"
 ---
-Iterating over `range(len(...))` is a common approach to accessing each item in an ordered collection.
+Beginners often iterate over `range(len(...))` because they look like Java or C-style loops, but this is almost always a bad practice in Python.
 ```py
 for i in range(len(my_list)):
     do_something(my_list[i])
 ```
-The pythonic syntax is much simpler, and is guaranteed to produce elements in the same order:
+It's much simpler to iterate over the list (or other sequence) directly:
 ```py
 for item in my_list:
     do_something(item)