Merge branch 'Olivier-Boudeville/doc/improve-bitstring-default-match-…

…wording' into maint

* Olivier-Boudeville/doc/improve-bitstring-default-match-wording:
  Respect hard word-wrap at column 80
  Clarify default type of matched values in bit strings

system/doc/reference_manual/expressions.md

@@ -1298,8 +1298,8 @@ Each element `Ei` specifies a _segment_ of the bit string. The segments are
 ordered left to right from the most significant bit to the least significant bit
 of the bit string.
 
-Each segment specification `Ei` is a value, followed by an optional _size
-expression_ and an optional _type specifier list_.
+Each segment specification `Ei` is a value, whose default type is `integer`,
+followed by an optional _size expression_ and an optional _type specifier list_.
 
 ```
 Ei = Value |