fix typos

Author: Jeremy Mill

esprima/parser.py

@@ -1098,7 +1098,7 @@ def parseLeftHandSideExpressionAllowCall(self):
         hasOptional = False
         while True:
             optional = False
-            if self.match('?/.'):
+            if self.match('?.'):
                 optional = True
                 hasOptional = True
                 self.expect('?.')
@@ -1148,7 +1148,7 @@ def parseLeftHandSideExpressionAllowCall(self):
                 break
 
         self.context.allowIn = previousAllowIn
-        if optional:
+        if hasOptional:
             return Node.ChainExpression(expr)
 
         return expr

esprima/scanner.py

@@ -568,7 +568,7 @@ def scanPunctuator(self):
             if self.source[self.index] == '?':
                 self.index += 1
                 str = '??'
-            if self.source[self.index] == '.' and self.source[self.index + 1].isdigit():
+            if self.source[self.index] == '.' and not self.source[self.index + 1].isdigit():
                 # "?." in "foo?.3:0" should not be treated as optional chaining.
                 # See https://github.com/tc39/proposal-optional-chaining#notes
                 self.index += 1