A number of minor fixes in help files.

Mostly typos/omissions/markup errors, more remarkable e. g. changing
'b' to 'B' in tutorial reflecting a change from 1.2.
Also uncommented [macros] section in asciidoc.conf (is that right?).

Signed-off-by: Doug Kearns <dougkearns@gmail.com>

vimperator/locale/en-US/asciidoc.conf

@@ -28,7 +28,7 @@ HEADER=<div style="float: right; padding-left: 1px;"> <form action="https://www.
 \[count\]=<span class="argument">&#91;count&#93;</span>
 \[!\]=<span class="argument">&#91;!&#93;</span>
 
-# [macros]
+[macros]
 # section:Introduction[tag1,tag2]
 (?su)(?<!\S)[\\]?\|(?P<attrlist>.+?)\|(?!\+)=section
 # help:helptext[href]
@@ -56,6 +56,7 @@ HEADER=<div style="float: right; padding-left: 1px;"> <form action="https://www.
 [m]=#mapping
 [a]=#argument
 # FIXME: this prevents all asciidoc attribute processing
+# ^obviously it doesn't? --stepnem
 {|}=argument2
 # disable monospaced text as all our text is monospaced and it causes problems for some things
 +=