fix

Author: IanButterworth

stdlib/REPL/src/REPLCompletions.jl

@@ -1130,9 +1130,10 @@ function in_scope_of_prefix(string::String, pos::Int, separatorpos::Int)
     pos <= separatorpos && return true
     after_separator = string[separatorpos+1:pos]
     isempty(after_separator) && return true
-    if any(in(non_identifier_chars), after_separator)
-        # Non-identifier chars means we're not in the identifier linked to the prefix
-        # i.e. the space in `Base.@time x`, or ( in `Base.@time(x`
+    # check for spaces outside of strings, i.e. not `var"foo bar"`
+    # also accounting for incomplete strings like `var"foo `
+    if occursin(r"^(?:[^\"]+|\"[^\"]*\")*\s", after_separator)
+        # i.e. the space in `Base.@time x`
         return false
     else
         return true