Expected vs observed behavior: "<small>" should be either in the "Style text" menu or should function as expected when typed (like "{{" or "[["); ideally both. If not possible/practical, it should trigger the "Wikitext markup detected" message. Also, the text of that bubble refers to a nonexistent user interface feature (a "Switch to source editing" menu option in the dropdown to the left of the "Save page" button); rather, that capability is located in the "Switch to source editing" button (icon looks like "[[ ]]"). The current reading is:
You are using the visual editor - wikitext does not work here. To switch to source editing at any time without losing your changes, open the dropdown menu next to "Save page" and select "Switch to source editing?".
I propose that it be changed to read:
You are using the visual editor — wikitext does not work here. To switch to source editing at any time without losing your changes, tap the "Switch to source editing" button next to the "Save page" button.
or:
You are using the visual editor — wikitext does not work here. To switch to source editing at any time without losing your changes, tap the "Switch to source editing" button (reads "[[ ]]") next to the "Save page" button.
or something to that effect.
Problem encountered at: https://en.wikipedia.org/w/index.php?title=Wounded_Knee_incident&diff=prev&oldid=723118346 (see the bottom of the diff) (next parenthetical is tangential) (the <nowiki>''</nowiki> in the diff is user error attributable to trying to get the "Wiki markup detected" box to show up again so I could read the instructions for using the "Switch to source editing" feature without realizing that it disappears before the offending markup is deleted (I mistakenly assumed that its disappearing indicated that the markup was gone because I had happened to delete my added markup manually at pretty much the same time as the notification disappeared the first time I saw it); I wasn't being particularly attentive so I neglected to notice the continued presence of the '') (if anyone actually understands this tangential, "<small>"-ified wall of text, they probably deserve a fuckin award for language comprehension skills; I bet I'd have gotten lost and/or glazed over way before getting to the end of it).
Browser: FirefoxDeveloperEdition
Browser version: 48.0a2 (2016-05-31)
Operating system: OS X 10.11.5
Wiki skin: Vector Wikipedia:User:Goldenshimmer/common.css
—{{u|Goldenshimmer}}|✝️|ze/zer|😹|T/C|☮️|John15:12|🍂 02:18, 2 June 2016 (UTC)