fix whitespace

doc/Language/5to6-nutshell.pod6

@@ -58,7 +58,7 @@ promising.
 
 =head2 Identifiers
 
-In identifiers, Perl 6 allows the use of dashes (C<->), underscores (C<_>), apostrophes (C<'>), and alphanumerics:
+In identifiers, Perl 6 allows the use of dashes (C<->), underscores (C<_>), apostrophes (C<'>), and alphanumerics:
 
     sub test-doesn't-hang { ... }
     my $ความสงบ = 42;

doc/Language/io.pod6

@@ -77,9 +77,9 @@ explicit encoding can be specified via the C<:enc> option:
 =for code :skip-test
 spurt "testfile", "latin1 text: äöüß", enc => "latin1";
 
-Writing formatted strings to a file is not directly supported at the moment because function 
-'printf' is not yet a method of C<IO::Handle>. However, as a work-around, one can use 
-function 'sprintf' to assign a formatted string to a C<Str> object that can then be 
+Writing formatted strings to a file is not directly supported at the moment because function
+'printf' is not yet a method of C<IO::Handle>. However, as a work-around, one can use
+function 'sprintf' to assign a formatted string to a C<Str> object that can then be
 used with methods '.say' or '.print' as desired.
 
 To append to a file, specify the C<:a> option when opening the file handle

doc/Language/mop.pod6

@@ -51,7 +51,7 @@ These are introspective macros that resemble method calls.
 Metamethods are generally named with ALLCAPS, and it is considered good
 style to avoid creating your own methods with ALLCAPS names.  This will avoid
 conflicts with any metamethods that may appear in future versions of the
-language.  
+language.
 
 =head2 X<WHAT|syntax,WHAT>