missing tab-completion help for emoji

[stevengj]

As reported on discourse, the REPL help doesn't show tab completion info for emoji even when it exists, unlike for other Unicode completions:

help?> α
"α" can be typed by \alpha<tab>
search:

Couldn't find α
Perhaps you meant !, %, &, *, +, -, /, :, <, >, \, ^, |, ~, ÷, π, ℯ, ∈, ∉ or ∋
  No documentation found.

  Binding α does not exist.

help?> 👍
search:

Couldn't find 👍
Perhaps you meant !, %, &, *, +, -, /, :, <, >, \, ^, |, ~, ÷, π, ℯ, ∈, ∉ or ∋
  No documentation found.

  Binding 👍 does not exist.

even though 👍 is produced by tab completion of \:+1:

[stevengj]

The reason for this is that the emoji completions are in a separate list REPL.REPLCompletions.emoji_symbols from the latex completions REPL.REPLCompletions.latex_symbols for some reason, but the completions help only uses the latter.

Should be trivial to fix. For example, it would be enough to just replace this line with

for (k,v) in Iterators.flatten((Base.REPL_MODULE_REF[].REPLCompletions.latex_symbols,
                                Base.REPL_MODULE_REF[].REPLCompletions.emoji_symbols))

[utkarsh2102]

I'll take a stab at this 🌮