I have found the following duplication of the word "the" in rev. 26:
7.1.12.1 ToString Applied to the Number Type
Algorithm, step 7: "... of the the most significant ..."
14.1.2 Static Semantics: Early Errors
14.4.1 Static Semantics: Early Errors
"... if BindingIdentifier is the the ..." (twice)
<del>
19.1.3.5 Object.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
"The the optional parameters ..."
</del>
(see Bug 3050)
22.2.3.7 %TypedArray%.prototype.every ( callbackfn [ , thisArg ] )
22.2.3.10 %TypedArray%.prototype.find (predicate [ , thisArg ] )
22.2.3.11 %TypedArray%.prototype.findIndex ( predicate [ , thisArg ] )
22.2.3.12 %TypedArray%.prototype.forEach ( callbackfn [ , thisArg ] )
22.2.3.19 %TypedArray%.prototype.reduce ( callbackfn [ , initialValue ] )
22.2.3.20 %TypedArray%.prototype.reduceRight ( callbackfn [ , initialValue ] )
22.2.3.25 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] )
"... may neuter the the this value." (seven times)
24.1.1.7 SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isLittleEndian )
step 12.a: "Let n be the the Number value ..."
fixed in rev27 editor's draft
fixed in rev27 draft