Documentation: typofixes

In addition to fixing trivial and obvious typos, be careful about
the following points:

 - Spell ASCII, URL and CRC in ALL CAPS;
 - Spell Linux as Capitalized;
 - Do not omit periods in "i.e." and "e.g.".

Signed-off-by: Thomas Ackermann <th.acker@arcor.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 9b45bda..c892ffa 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -665,7 +665,7 @@
 may want to override its decision, either because a blob contains binary
 data later in the file, or because the content, while technically
 composed of text characters, is opaque to a human reader. For example,
-many postscript files contain only ascii characters, but produce noisy
+many postscript files contain only ASCII characters, but produce noisy
 and meaningless diffs.
 
 The simplest way to mark a file as binary is to unset the diff
@@ -680,7 +680,7 @@
 
 However, one may also want to specify other diff driver attributes. For
 example, you might want to use `textconv` to convert postscript files to
-an ascii representation for human viewing, but otherwise treat them as
+an ASCII representation for human viewing, but otherwise treat them as
 binary files. You cannot specify both `-diff` and `diff=ps` attributes.
 The solution is to use the `diff.*.binary` config option: