Correct minor typographical issues in setbagmix.pod

Author: paultcochrane

lib/Language/setbagmix.pod

@@ -33,10 +33,10 @@ TODO: Partial type graph showing only QuantHash, Setty, Baggy, Mixy, Set,
       SetHash, Bag, BagHash, Mix, MixHash.
 
 The six collection classes C<Set>, C<SetHash>, C<Bag>, C<BagHash>, C<Mix>,
-C<MixHash>, all share similar semantics:
+C<MixHash>, all share similar semantics.
 
 For one thing, as far as they are concerned, identical objects refer to the same
-element - where identity is determined using the L<WHICH> methods (i.e. the same
+element -- where identity is determined using the L<WHICH> methods (i.e. the same
 way that the L<===> operator checks identity). For value types like C<Str>, this
 means having the same value; for reference types like C<Array>, it means
 referring to the same object instance.
@@ -124,7 +124,7 @@ not contain C<$b>.
     multi sub infix:<<(<=)>>(Setty $a, Setty $b --> Bool)
 
 Returns C<True> if C<$a> is a B<subset> or is equal to C<$b>, i.e., if all the
-elements of C<$a> are elements of C<$b>, and C<$a> is a smaller or equal
+elements of C<$a> are elements of C<$b> and C<$a> is a smaller or equal
 sized set than C<$b>.
 
 =head4 infix ⊆
@@ -145,7 +145,7 @@ Equivalent to C«!(<=)».
     multi sub infix:<<(<)>>(Setty $a, Setty $b --> Bool)
 
 Returns C<True> if C<$a> is a B<strict subset> of C<$b>, i.e., that all the
-elements of C<$a> are elements of C<$b>, but C<$a> is a smaller set than
+elements of C<$a> are elements of C<$b> but C<$a> is a smaller set than
 C<$b>.
 
 =head4 infix ⊂
@@ -236,7 +236,7 @@ Equivalent to L«(+>)».
 
     only sub infix:<(|)>(**@p)
 
-Returns the B<union> of all of its arguments. Generally, this creates a new
+Returns the B<union> of all its arguments. Generally, this creates a new
 C<Set> that contains all the elements its arguments contain.
 
     <a a b c d> (|) <h g f e d c> (|) <i j> === set <a b c d e f g h i j>
@@ -266,7 +266,7 @@ arguments contain.
 
 If any of its arguments are C<Baggy>, this creates a new C<Bag> that
 contains only the elements that all of the arguments contain, each
-weighted the max weight all of the arguments share for that element.
+weighted by the maximum weight all of the arguments share for that element.
 
     bag(<a a b c a>) (&) bag(<a a b c c>) === bag(<a a b c>)
 
@@ -312,7 +312,7 @@ all the elements C<$b> has but C<$a> doesn't. Equivalent to C<($a ∖ $b)
 
     only sub infix:<<"\x2296">>($a, $b --> Setty)
 
-Equivalent to L«(^)»
+Equivalent to L«(^)».
 
 =head3 infix (.)