bpo-45975: IDLE - Remove extraneous parens (pythonGH-31107)

mistakenly included in 3 files in previous PR
and backported both to 3.10 and 3.9.

Author: terryjreedy

Lib/idlelib/pyparse.py

@@ -179,7 +179,7 @@ def find_good_parse_start(self, is_char_in_string):
         # Peeking back worked; look forward until _synchre no longer
         # matches.
         i = pos + 1
-        while (m := _synchre(code, i)):
+        while m := _synchre(code, i):
             s, i = m.span()
             if not is_char_in_string(s):
                 pos = s

Lib/idlelib/replace.py

@@ -158,8 +158,8 @@ def replace_all(self, event=None):
         first = last = None
         # XXX ought to replace circular instead of top-to-bottom when wrapping
         text.undo_block_start()
-        while (res := self.engine.search_forward(
-                text, prog, line, col, wrap=False, ok=ok)):
+        while res := self.engine.search_forward(
+                text, prog, line, col, wrap=False, ok=ok):
             line, m = res
             chars = text.get("%d.0" % line, "%d.0" % (line+1))
             orig = m.group()

Lib/idlelib/run.py

@@ -482,7 +482,7 @@ def read(self, size=-1):
         result = self._line_buffer
         self._line_buffer = ''
         if size < 0:
-            while (line := self.shell.readline()):
+            while line := self.shell.readline():
                 result += line
         else:
             while len(result) < size: