only remove prompt prefix in bracket paste

Author: KristofferC

base/LineEdit.jl

@@ -1302,9 +1302,14 @@ Must satisfy `0 < tabwidth <= 16`.
 """
 global tabwidth = 8
 
+const STANDARD_REPL_PROMPTS = ["julia> ", "help?> ", "shell> "]
+
 function bracketed_paste(s)
     ps = state(s, mode(s))
     input = readuntil(ps.terminal, "\e[201~")[1:(end-6)]
+    if ps.p.prompt in STANDARD_REPL_PROMPTS && startswith(input, ps.p.prompt)
+        input = input[sizeof(ps.p.prompt)+1:end]
+    end
     input = replace(input, '\r', '\n')
     if position(buffer(s)) == 0
         indent = Base.indentation(input; tabwidth=tabwidth)[1]

base/REPL.jl

@@ -832,8 +832,18 @@ function setup_interface(repl::LineEditREPL; hascolor = repl.hascolor, extra_rep
             oldpos = start(input)
             firstline = true
             while !done(input, oldpos) # loop until all lines have been executed
-                if startswith(input, "julia> ")
-                    input = input[8:end]
+                # Check if the next statement starts with "julia> ", in that case
+                # skip it.
+                # First skip and count newline characters
+                c = oldpos
+                while c <= sizeof(input) && input[c] == '\n'
+                    c = nextind(input, c)
+                end
+                n_newlines = c - oldpos
+                # Skip over prompt prefix if statement starts with it
+                jl_prompt_len = 7
+                if c + jl_prompt_len <= sizeof(input) && input[c:c+jl_prompt_len-1] == "julia> "
+                    oldpos += jl_prompt_len + n_newlines
                 end
                 ast, pos = Base.syntax_deprecation_warnings(false) do
                     Base.parse(input, oldpos, raise=false)