Revert "fix string completion with cursor in the middle of text (#60055)"

This reverts commit 1cc404e.

Author: KristofferC

stdlib/REPL/src/REPLCompletions.jl

@@ -1047,7 +1047,7 @@ function completions(string::String, pos::Int, context_module::Module=Main, shif
     #  "~/example.txt TAB => "/home/user/example.txt"
     r, closed = find_str(cur)
     if r !== nothing
-        s = do_string_unescape(string[intersect(r, 1:pos)])
+        s = do_string_unescape(string[r])
         ret, success = complete_path_string(s, hint; string_escape=true,
                                             dirsep=Sys.iswindows() ? '\\' : '/')
         if length(ret) == 1 && !closed && close_path_completion(ret[1].path)

stdlib/REPL/test/replcompletions.jl

@@ -1458,40 +1458,6 @@ let (c, r) = test_complete("cd(\"folder_do_not_exist_77/file")
     @test length(c) == 0
 end
 
-# Test path completion in the middle of a line (issue #60050)
-mktempdir() do path
-    # Create test directory structure
-    foo_dir = joinpath(path, "foo_dir")
-    mkpath(foo_dir)
-    touch(joinpath(path, "foo_file.txt"))
-
-    # Completion at end of line should work
-    let (c, r, res) = test_complete("\"$(path)/foo")
-        @test res
-        @test length(c) == 2
-        @test "$(path)/foo_dir/" in c
-        @test "$(path)/foo_file.txt" in c
-    end
-
-    # Completion in middle of line should also work (regression in 1.12)
-    let (c, r, res) = test_complete_pos("\"$(path)/foo|/bar.toml\"")
-        @test res
-        @test length(c) == 2
-        @test "$(path)/foo_dir/" in c
-        @test "$(path)/foo_file.txt" in c
-        # Check that the range covers only the part before the cursor
-        @test findfirst("/bar", "\"$(path)/foo/bar.toml\"")[1] - 1 in r
-    end
-
-    # Completion in middle of function call with trailing arguments
-    let (c, r, res) = test_complete_pos("run_something(\"$(path)/foo|/bar.toml\"; kwarg=true)")
-        @test res
-        @test length(c) == 2
-        @test "$(path)/foo_dir/" in c
-        @test "$(path)/foo_file.txt" in c
-    end
-end
-
 if Sys.iswindows()
     tmp = tempname()
     touch(tmp)