Clarify math.bitwise -vs- bitwise-arithmetic docs

basis/math/bitwise/bitwise-docs.factor

@@ -310,8 +310,9 @@ ARTICLE: "math-bitfields" "Constructing bit fields"
 "Some applications, such as binary communication protocols and assemblers, need to construct integers from elaborate bit field specifications. Hand-coding this using " { $link shift } " and " { $link bitor } " results in repetitive code. A higher-level facility exists to factor out this repetition:"
 { $subsection bitfield } ;
 
-ARTICLE: "math.bitwise" "Bitwise arithmetic"
+ARTICLE: "math.bitwise" "Additional bitwise arithmetic"
-"The " { $vocab-link "math.bitwise" } " vocabulary can implements bitwise arithmetic words that are useful for efficiency, low-level programming, and interfacing with C libraries." $nl
+"The " { $vocab-link "math.bitwise" } " vocabulary provides bitwise arithmetic words extending " { $link "bitwise-arithmetic" } ". They are useful for efficiency, low-level programming, and interfacing with C libraries."
+$nl
 "Setting and clearing bits:"
 { $subsection set-bit }
 { $subsection clear-bit }

core/math/math-docs.factor

@@ -348,6 +348,7 @@ ARTICLE: "bitwise-arithmetic" "Bitwise arithmetic"
 { $subsection 2/ }
 { $subsection 2^ }
 { $subsection bit? }
+"The " { $vocab-link "math.bitwise" } " vocabulary implements additional bitwise integer operations."
 { $see-also "conditionals" } ;
 
 ARTICLE: "arithmetic" "Arithmetic"