Fix REPL help mode to show help for using/import (#34757)

Fix REPL help mode to show help for using/import for
:(using A)/:(import A) expressions, fixes #34713.


Co-authored-by: Shan Sikdar <[email protected]>
Co-authored-by: Fredrik Ekre <[email protected]>

Author: ssikdar1

stdlib/REPL/src/docview.jl

@@ -37,6 +37,8 @@ function _helpmode(io::IO, line::AbstractString)
             # Docs for keywords must be treated separately since trying to parse a single
             # keyword such as `function` would throw a parse error due to the missing `end`.
             Symbol(line)
+        elseif isexpr(x, (:using, :import))
+            x.head
         else
             # Retrieving docs for macros requires us to make a distinction between the text
             # `@macroname` and `@macroname()`. These both parse the same, but are used by

stdlib/REPL/test/repl.jl

@@ -1027,9 +1027,11 @@ for (line, expr) in Pair[
     "while       " => :while, # keyword, trailing spaces should be stripped.
     "0"            => 0,
     "\"...\""      => "...",
-    "r\"...\""     => Expr(:macrocall, Symbol("@r_str"), LineNumberNode(1, :none), "...")
+    "r\"...\""     => Expr(:macrocall, Symbol("@r_str"), LineNumberNode(1, :none), "..."),
+    "using Foo"    => :using,
+    "import Foo"   => :import,
     ]
-    #@test REPL._helpmode(line) == Expr(:macrocall, Expr(:., Expr(:., :Base, QuoteNode(:Docs)), QuoteNode(Symbol("@repl"))), LineNumberNode(119, doc_util_path), stdout, expr)
+    @test REPL._helpmode(line).args[4] == expr
     buf = IOBuffer()
     @test Base.eval(REPL._helpmode(buf, line)) isa Union{Markdown.MD,Nothing}
 end

test/docs.jl

@@ -982,8 +982,6 @@ let x = Binding(Main, :⊕)
     @test Meta.parse(string(x)) == :(⊕)
 end
 
-doc_util_path = Symbol(joinpath("docs", "utils.jl"))
-
 @test sprint(repl_latex, "√") == "\"√\" can be typed by \\sqrt<tab>\n\n"
 @test sprint(repl_latex, "x̂₂") == "\"x̂₂\" can be typed by x\\hat<tab>\\_2<tab>\n\n"