Rewriting some sentences in glossary for better flow

Sometimes the text didn't make sense, or there was a term or word missing,
thus I've collected here the "higher risk" edits, which could *potentially*
change the meaning of the text, however I have tried my utmost *not* to do
so.  Please accept my apologies in advance if my edits have changed the
original intent.

S99-glossary.pod

@@ -561,7 +561,7 @@ yet in the end pleasing nobody, because nobody is catered for enough.
 
 =head2 empty list
 
-A list which contains no value. Noted C<()>.
+A list which contains no value. Denoted C<()>.
 
 =head2 EPIC FAIL
 
@@ -792,7 +792,7 @@ Also, a given language may provide many flavors of them.
 Perl 6 provides common L</concrete syntax> to access them.
 C<MVMHLLConfig> is the L</MoarVM> C level structure that hooks
 to the underlying language specific representations.
-The L</metamodel> allows expression of specific semantics proper to a given L</OO> language.
+The L</metamodel> allows one to express specific semantics proper to a given L</OO> language.
 L</Zavolaj> provides interoperabiity with languages which compilers
 follow C language linking conventions.
 
@@ -882,7 +882,7 @@ A built-in arbitrary-sized integer type. See L<http://doc.perl6.org/type/Int>.
 In a compiler, Intermediate data structures that are generated from
 the L</source code> to generate L</object code> or L</bytecode>.
 In L</Rakudo> : L</parse tree>, and L<Abstract Syntax Tree|/AST>.
-The L</parser> generates a  that is transformeed to an L</AST>s
+The L</parser> generates an IR that is transformed to an L</AST>.
 Sometimes the information can be regenerated from the bytecode.
 In Rakudo the Single Static Assignment form is inferred from the bytecode.
 
@@ -1196,7 +1196,7 @@ An implementation of Perl 6 targeting the .NET platform.
 
 =head2 Nil
 
-Means there is no value there which is different from C<()>, the L</empty list>.
+Means there is no value.  This is different from C<()>, the L</empty list>.
 
 =head2 NST
 
@@ -1268,17 +1268,17 @@ An expression is made of operators and operands. More precisely it is made of an
 operands that can be subexpressions or L</values>.
 Operators are an alternative syntax for a L<multi method>. With that syntax, what would be the L</argument>s of the function
 are named operands instead. Operators are classified into L<categories|http://design.perl6.org/S02.html#Grammatical_Categories> of categories.
-A category has a precedence, an arity, can be L</fidly>, L</iffy>, L</diffy>.
-Perl 6 is very creative as to what is an operator so they are many categories which operators are amde
-of many tokens, possibly with a subexpression.  For example,  L<@a[0]> belongs to the
-postcircumfix category is broken in the operand C<@a> and the
-postcircumfix operator L<[0]> where C<0> is postcircumfixed subexpression.
+A category has a precedence, an arity, and can be L</fidly>, L</iffy>, L</diffy>.
+Perl 6 is very creative as to what is an operator, so there are many categories.  Operators are made
+of many tokens, possibly with a subexpression.  For example, L<@a[0]> belongs to the
+postcircumfix category, is broken into the operand C<@a> and the
+postcircumfix operator L<[0]> where C<0> is the postcircumfixed subexpression.
 
 The C<< <O(I<...>)>  >> construction gives information about an operator that completes the
 information provided by its category.
-Below C<%conditional> is the category, C<< :reducecheck<ternary> >> specifies to call C<.ternary> to
-posprocess the L<parse subtree|parse tree> and C<< :pasttype<if> >> specify the nqp L</opcode> generated in the
-L</AST> from the parse subtree
+Below C<%conditional> is the category, C<< :reducecheck<ternary> >>, which specifies calling C<.ternary> to
+posprocess the L<parse subtree|parse tree> and C<< :pasttype<if> >> specifies the nqp L</opcode> generated in the
+L</AST> from the parse subtree.
 
         <O('%conditional, :reducecheck<ternary>, :pasttype<if>')>
 
@@ -1686,7 +1686,7 @@ fact that it doesn't work goes unnoticed.
 =head2 SC
 
 A L</serialization context> groups together things, usually from the same
-L</compilation unit>.
+L</compilation Unit>.
 
 =head2 scalar
 
@@ -1750,7 +1750,7 @@ If planeteria.org is down, a replacement can be found on L<http://pl6anet.org/>.
 Short for sublanguage. A slang is a L</grammar> derived from the Perl 6 grammar, and its associated L</actions>.
 Alternatively the Perl 6 syntax
 can be seen as the combination of many slangs (the regex slang, the quotation slang...)
-Defining a slang has a cost because it usually involves generating new L</NFA> tables but except for
+Defining a slang has a cost because it usually involves generating new L</NFA> tables; except for
 the space taken by the said tables, it is compilation time cost.
 Slang is a principled way to create Domain Specific Languages (DSLs).
 
@@ -2163,12 +2163,12 @@ See L<https://github.com/dpk/yoleaux> and L<http://dpk.io/yoleaux>.
 =head2 Zavolaj
 
 L</Zavolaj|https://github.com/jnthn/zavolaj> is a module to support C<native call>s
-into L<libraries|/library>
+into L<libraries|/library>.
 
 =head2 Zen slice
 
 A Zen slice is a slice of an object without specification of the elements.
-A such it is empty, yet it is supposed to return the object in its entirety.
+As such it is empty, yet it is supposed to return the object in its entirety.
 Usually used as a way of interpolating entire hashes / arrays in strings.
 
 =head1 *