Corrects minor errors and closes #2826

Author: JJ

doc/Language/statement-prefixes.pod6

@@ -2,17 +2,17 @@
 
 =TITLE Statement prefixes
 
-=SUBTITLE Prefixes that alter the behavior of a statement of set of them
+=SUBTITLE Prefixes that alter the behavior of a statement or a set of them
 
-Statement prefixes are not statements per se. They are written in front of a
+Statement prefixes are written in front of a
 statement, and change their meaning, their output, or the moment they are going
 to be run. Since they have a specific behavior, they are also sometimes specific
-to some statement or statements.
+to some statement or group of statements.
 
 =head2 X<C<lazy>|lazy (statement prefix)>
 
-As a statement prefix, lazy acts in front of any statement, including C<for>
-loops, saving the execution for when the variable they are assigned for is
+As a statement prefix, C<lazy> acts in front of any statement, including C<for>
+loops, saving the execution for when the variable they are assigned to is
 actually needed.
 
 =for code
@@ -25,7 +25,7 @@ say eager $var;   # OUTPUT: «(0 1 2 3)␤»
 say $incremented; # OUTPUT: «4␤»
 
 The C<$incremented> variable is only incremented, that is, the internal part of
-the loop is only run, when we eagerly evaluate the variable C<$var> that
+the loop is only run when we eagerly evaluate the variable C<$var> that
 contains the lazy loop. Eagerness can be applied on a variable in other ways,
 such as calling the C<.eager> method on it.