Issue #16819: IDLE method completion now correctly works for bytes literals.

diff --cc Lib/idlelib/HyperParser.py
index 38a19f2189caff7d24836b4c4f2d5575467c69b4,4414de72bc5239e82b1bba0dfbae991754a2fc47..4af4b085c7c0c537c5a22aa74a917cc3a4168a61
--- 1/Lib/idlelib/HyperParser.py
--- 2/Lib/idlelib/HyperParser.py
+++ b/Lib/idlelib/HyperParser.py
@@@ -232,6 -232,11 +232,11 @@@ class HyperParser
                      pass
                  else:
                      # We can't continue after other types of brackets
 -                        while pos > 0 and rawtext[pos - 1] in "rRbB":
+                     if rawtext[pos] in "'\"":
+                         # Scan a string prefix
++                        while pos > 0 and rawtext[pos - 1] in "rRbBuU":
+                             pos -= 1
+                         last_identifier_pos = pos
                      break
  
              else:

diff --cc Misc/NEWS
Simple merge